<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossNotes" xlink:href="qlys-20200331.xsd#AccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossTables" xlink:href="qlys-20200331.xsd#AccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossComponentsOfChangesInAccumulatedOtherComprehensiveIncomeDetails" xlink:href="qlys-20200331.xsd#AccumulatedOtherComprehensiveIncomeLossComponentsOfChangesInAccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/BusinessCombinationBusinessCombination" xlink:href="qlys-20200331.xsd#BusinessCombinationBusinessCombination" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/BusinessCombinationNarrativeDetails" xlink:href="qlys-20200331.xsd#BusinessCombinationNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CommitmentsAndContingencies" xlink:href="qlys-20200331.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CommitmentsAndContingenciesLeaseNarrativeDetails" xlink:href="qlys-20200331.xsd#CommitmentsAndContingenciesLeaseNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CompanyAndSummaryOfSignificantAccountingPolicies" xlink:href="qlys-20200331.xsd#CompanyAndSummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CompanyAndSummaryOfSignificantAccountingPoliciesNonmarketableSecuritiesDetails" xlink:href="qlys-20200331.xsd#CompanyAndSummaryOfSignificantAccountingPoliciesNonmarketableSecuritiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CompanyAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="qlys-20200331.xsd#CompanyAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CondensedConsolidatedBalanceSheets" xlink:href="qlys-20200331.xsd#CondensedConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:href="qlys-20200331.xsd#CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:href="qlys-20200331.xsd#CondensedConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:href="qlys-20200331.xsd#CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeParenthetical" xlink:href="qlys-20200331.xsd#CondensedConsolidatedStatementsOfComprehensiveIncomeParenthetical" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/CondensedConsolidatedStatementsOfOperations" xlink:href="qlys-20200331.xsd#CondensedConsolidatedStatementsOfOperations" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="qlys-20200331.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/DocumentAndEntityInformation" xlink:href="qlys-20200331.xsd#DocumentAndEntityInformation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/FairValueOfFinancialInstruments" xlink:href="qlys-20200331.xsd#FairValueOfFinancialInstruments" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/FairValueOfFinancialInstrumentsAdditionalInformationDetails" xlink:href="qlys-20200331.xsd#FairValueOfFinancialInstrumentsAdditionalInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/FairValueOfFinancialInstrumentsCashAndCashEquivalentsAvailableForSaleSecuritiesReconciliationDetails" xlink:href="qlys-20200331.xsd#FairValueOfFinancialInstrumentsCashAndCashEquivalentsAvailableForSaleSecuritiesReconciliationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/FairValueOfFinancialInstrumentsChangesInAccumulatedOtherComprehensiveIncomeDetails" xlink:href="qlys-20200331.xsd#FairValueOfFinancialInstrumentsChangesInAccumulatedOtherComprehensiveIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/FairValueOfFinancialInstrumentsContractualMaturityDetails" xlink:href="qlys-20200331.xsd#FairValueOfFinancialInstrumentsContractualMaturityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/FairValueOfFinancialInstrumentsDerivativesDetails" xlink:href="qlys-20200331.xsd#FairValueOfFinancialInstrumentsDerivativesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/FairValueOfFinancialInstrumentsFairValueHierarchyDetails" xlink:href="qlys-20200331.xsd#FairValueOfFinancialInstrumentsFairValueHierarchyDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/FairValueOfFinancialInstrumentsFairValueOfNonMarketableSecuritiesDetails" xlink:href="qlys-20200331.xsd#FairValueOfFinancialInstrumentsFairValueOfNonMarketableSecuritiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/FairValueOfFinancialInstrumentsGainsLossesRecognizedDetails" xlink:href="qlys-20200331.xsd#FairValueOfFinancialInstrumentsGainsLossesRecognizedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/FairValueOfFinancialInstrumentsTables" xlink:href="qlys-20200331.xsd#FairValueOfFinancialInstrumentsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/GoodwillAndIntangibleAssetsNet" xlink:href="qlys-20200331.xsd#GoodwillAndIntangibleAssetsNet" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/GoodwillAndIntangibleAssetsNetCarryingValueOfIntangibleAssetsDetails" xlink:href="qlys-20200331.xsd#GoodwillAndIntangibleAssetsNetCarryingValueOfIntangibleAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/GoodwillAndIntangibleAssetsNetFutureAmortizationDetails" xlink:href="qlys-20200331.xsd#GoodwillAndIntangibleAssetsNetFutureAmortizationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/GoodwillAndIntangibleAssetsNetTables" xlink:href="qlys-20200331.xsd#GoodwillAndIntangibleAssetsNetTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/IncomeTaxes" xlink:href="qlys-20200331.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/IncomeTaxesDetails" xlink:href="qlys-20200331.xsd#IncomeTaxesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/LeasesDetails" xlink:href="qlys-20200331.xsd#LeasesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/LeasesNotes" xlink:href="qlys-20200331.xsd#LeasesNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/LeasesTables" xlink:href="qlys-20200331.xsd#LeasesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/NetIncomePerShare" xlink:href="qlys-20200331.xsd#NetIncomePerShare" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/NetIncomePerShareDetails" xlink:href="qlys-20200331.xsd#NetIncomePerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/NetIncomePerShareTables" xlink:href="qlys-20200331.xsd#NetIncomePerShareTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/PropertyAndEquipmentNet" xlink:href="qlys-20200331.xsd#PropertyAndEquipmentNet" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/PropertyAndEquipmentNetDetails" xlink:href="qlys-20200331.xsd#PropertyAndEquipmentNetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/PropertyAndEquipmentNetTables" xlink:href="qlys-20200331.xsd#PropertyAndEquipmentNetTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/RevenueFromContractsWithCustomers" xlink:href="qlys-20200331.xsd#RevenueFromContractsWithCustomers" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/RevenueFromContractsWithCustomersCommissionAssetBalancesDetails" xlink:href="qlys-20200331.xsd#RevenueFromContractsWithCustomersCommissionAssetBalancesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/RevenueFromContractsWithCustomersNarrativeDetails" xlink:href="qlys-20200331.xsd#RevenueFromContractsWithCustomersNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/RevenueFromContractsWithCustomersRevenueBySalesChannelDetails" xlink:href="qlys-20200331.xsd#RevenueFromContractsWithCustomersRevenueBySalesChannelDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/RevenueFromContractsWithCustomersTables" xlink:href="qlys-20200331.xsd#RevenueFromContractsWithCustomersTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/RevenueFromContractsWithCustomersUnbilledContractsDetails" xlink:href="qlys-20200331.xsd#RevenueFromContractsWithCustomersUnbilledContractsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/SegmentInformationAndInformationAboutGeographicArea" xlink:href="qlys-20200331.xsd#SegmentInformationAndInformationAboutGeographicArea" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/SegmentInformationAndInformationAboutGeographicAreaPropertyAndEquipmentNetDetails" xlink:href="qlys-20200331.xsd#SegmentInformationAndInformationAboutGeographicAreaPropertyAndEquipmentNetDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/SegmentInformationAndInformationAboutGeographicAreaRevenueByGeographicAreaDetails" xlink:href="qlys-20200331.xsd#SegmentInformationAndInformationAboutGeographicAreaRevenueByGeographicAreaDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/SegmentInformationAndInformationAboutGeographicAreaTables" xlink:href="qlys-20200331.xsd#SegmentInformationAndInformationAboutGeographicAreaTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/StockBasedCompensation" xlink:href="qlys-20200331.xsd#StockBasedCompensation" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/StockBasedCompensationExpenseDetails" xlink:href="qlys-20200331.xsd#StockBasedCompensationExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/StockBasedCompensationPerformanceBasedAwardsAndOptionsAndShareRepurchaseProgramdetails" xlink:href="qlys-20200331.xsd#StockBasedCompensationPerformanceBasedAwardsAndOptionsAndShareRepurchaseProgramdetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/StockBasedCompensationRestrictedStockDetails" xlink:href="qlys-20200331.xsd#StockBasedCompensationRestrictedStockDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/StockBasedCompensationStockOptionPlanActivityDetails" xlink:href="qlys-20200331.xsd#StockBasedCompensationStockOptionPlanActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/StockBasedCompensationStockOptionsDetails" xlink:href="qlys-20200331.xsd#StockBasedCompensationStockOptionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/StockBasedCompensationTables" xlink:href="qlys-20200331.xsd#StockBasedCompensationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/StockholdersEquity" xlink:href="qlys-20200331.xsd#StockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/StockholdersEquityDetails" xlink:href="qlys-20200331.xsd#StockholdersEquityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.qualys.com/role/StockholdersEquityTables" xlink:href="qlys-20200331.xsd#StockholdersEquityTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedNetLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedNetLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodEndLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodEndLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedPeriodStartLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedPeriodStartLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple" />
  <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple" />
  <link:presentationLink xlink:role="http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossNotes" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityAbstract" xlink:label="loc_us-gaap_EquityAbstract_13A60BF95E353EA50EC8F0744C4B0E24" xlink:type="locator" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AccumulatedOtherComprehensiveIncomeDisclosureTextBlock" xlink:label="loc_qlys_AccumulatedOtherComprehensiveIncomeDisclosureTextBlock_D75FEFCA5612E65DED01F07534156727" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityAbstract_13A60BF95E353EA50EC8F0744C4B0E24" xlink:to="loc_qlys_AccumulatedOtherComprehensiveIncomeDisclosureTextBlock_D75FEFCA5612E65DED01F07534156727" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossAccumulatedOtherComprehensiveIncomeLossTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityAbstract" xlink:label="loc_us-gaap_EquityAbstract_BD7B43C3EA57DBBC0BD3F05B0FF2BD9A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_A3AB4971326550F43AF5F05B0FF33587" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityAbstract_BD7B43C3EA57DBBC0BD3F05B0FF2BD9A" xlink:to="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_A3AB4971326550F43AF5F05B0FF33587" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/AccumulatedOtherComprehensiveIncomeLossComponentsOfChangesInAccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityAbstract" xlink:label="loc_us-gaap_EquityAbstract_813972DB1BCAB807B1A3F02D076F861B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_EE5A54FCC6D455910885F02D07714DFA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityAbstract_813972DB1BCAB807B1A3F02D076F861B" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_EE5A54FCC6D455910885F02D07714DFA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_B180DEEFE22B12C5263DF02D0772B232" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_EE5A54FCC6D455910885F02D07714DFA" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_B180DEEFE22B12C5263DF02D0772B232" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_A8F7F168841C451BE2F4F02D0773B65D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_B180DEEFE22B12C5263DF02D0772B232" xlink:to="loc_us-gaap_EquityComponentDomain_A8F7F168841C451BE2F4F02D0773B65D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_D56F85BA1F48510963C1F02D3017F931" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_A8F7F168841C451BE2F4F02D0773B65D" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_D56F85BA1F48510963C1F02D3017F931" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_5AB91B9133A2D6C76D80F02D0773735B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_A8F7F168841C451BE2F4F02D0773B65D" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_5AB91B9133A2D6C76D80F02D0773735B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_EE5A54FCC6D455910885F02D07714DFA" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AociDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossCumulativeGainLossAfterTax" xlink:label="loc_us-gaap_AociDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossCumulativeGainLossAfterTax_FF26ACBF41B0FAFE52B1F02D0773ABEA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_AociDebtSecuritiesAvailableForSaleWithoutAllowanceForCreditLossCumulativeGainLossAfterTax_FF26ACBF41B0FAFE52B1F02D0773ABEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_04829B71CEFA5F69EB0EF02D077493C1" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossCumulativeChangesInNetGainLossFromCashFlowHedgesEffectNetOfTax_04829B71CEFA5F69EB0EF02D077493C1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_C7FE26FD483B8B6ADA2DF02D07740CF4" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_C7FE26FD483B8B6ADA2DF02D07740CF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_B3F310795CCEDE3591D7F02D0774E68D" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_B3F310795CCEDE3591D7F02D0774E68D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsNetOfTax_A572B2CFEF944A7A5321F02D07746A9B" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsNetOfTax_A572B2CFEF944A7A5321F02D07746A9B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_8428D928234EC3DA60F0F02D0775A241" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax_8428D928234EC3DA60F0F02D0775A241" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_8DA2F255B409D366BD54F02D07751161" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_8DA2F255B409D366BD54F02D07751161" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_6CD76D411D25827E5D0EF02D0775F97A" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_6CD76D411D25827E5D0EF02D0775F97A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_A715D34AFF8EA9C51522F02D0775EEE0" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_A715D34AFF8EA9C51522F02D0775EEE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_AABD30DFA760963E45DAF02D07751826" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_AABD30DFA760963E45DAF02D07751826" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_9A33BEC75347FDDE2573F02D077518F7" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_9A33BEC75347FDDE2573F02D077518F7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_117602B8BCDA1322ECE5F02D0776D948" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_117602B8BCDA1322ECE5F02D0776D948" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_300D481AD48072066AEFF02D0776FFEF" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_300D481AD48072066AEFF02D0776FFEF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_0E71CCF8AE5BA4078F44F02D077670EA" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_D363DD0F048088158E11F02D077322A0" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_0E71CCF8AE5BA4078F44F02D077670EA" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/BusinessCombinationBusinessCombination" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_55997C6E329DC26A3CE2D6C35F38659F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationDisclosureTextBlock" xlink:label="loc_us-gaap_BusinessCombinationDisclosureTextBlock_57CA24D12E10BC3DCDA6D6C35F382257" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_55997C6E329DC26A3CE2D6C35F38659F" xlink:to="loc_us-gaap_BusinessCombinationDisclosureTextBlock_57CA24D12E10BC3DCDA6D6C35F382257" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/BusinessCombinationNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationsAbstract" xlink:label="loc_us-gaap_BusinessCombinationsAbstract_53D423D72A039C2FCE9DE0F3CC452E45" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_71E96DCF071BF94EC574E0F3CC451674" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessCombinationsAbstract_53D423D72A039C2FCE9DE0F3CC452E45" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_71E96DCF071BF94EC574E0F3CC451674" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_3A546C955D2FE6A0F315E0F3CC450364" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_71E96DCF071BF94EC574E0F3CC451674" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_3A546C955D2FE6A0F315E0F3CC450364" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B975954F7908C863875CE0F3CC45507A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_3A546C955D2FE6A0F315E0F3CC450364" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B975954F7908C863875CE0F3CC45507A" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_DevelopedTechnologyMember" xlink:label="loc_qlys_DevelopedTechnologyMember_769F5D2097CA1E31BA73E0F3CC45FDD4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_B975954F7908C863875CE0F3CC45507A" xlink:to="loc_qlys_DevelopedTechnologyMember_769F5D2097CA1E31BA73E0F3CC45FDD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAxis" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_E28AB991312FF6108F1EE0F3CC45A22C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_71E96DCF071BF94EC574E0F3CC451674" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_E28AB991312FF6108F1EE0F3CC45A22C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionAcquireeDomain" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_566153B3E4DC24AC0873E0F3CC459CAA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_E28AB991312FF6108F1EE0F3CC45A22C" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_566153B3E4DC24AC0873E0F3CC459CAA" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_A1MobilityMember" xlink:label="loc_qlys_A1MobilityMember_73FAB2E4ABFBA8B573C9E0F3CC453BFC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_566153B3E4DC24AC0873E0F3CC459CAA" xlink:to="loc_qlys_A1MobilityMember_73FAB2E4ABFBA8B573C9E0F3CC453BFC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessAcquisitionLineItems" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_30F6D7ECEA773FF89816E0F3CC45466A" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_71E96DCF071BF94EC574E0F3CC451674" xlink:to="loc_us-gaap_BusinessAcquisitionLineItems_30F6D7ECEA773FF89816E0F3CC45466A" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_BusinessCombinationDeferredConsiderationPaymentPeriod" xlink:label="loc_qlys_BusinessCombinationDeferredConsiderationPaymentPeriod_95AC8BEF9F2A3B4C846FE121D8F0A9AB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_30F6D7ECEA773FF89816E0F3CC45466A" xlink:to="loc_qlys_BusinessCombinationDeferredConsiderationPaymentPeriod_95AC8BEF9F2A3B4C846FE121D8F0A9AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationConsiderationTransferred1" xlink:label="loc_us-gaap_BusinessCombinationConsiderationTransferred1_8B20745BEAFD97DF21C6E0F3CC4528B4" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_30F6D7ECEA773FF89816E0F3CC45466A" xlink:to="loc_us-gaap_BusinessCombinationConsiderationTransferred1_8B20745BEAFD97DF21C6E0F3CC4528B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_2BD8A815A16E52845E46E0F3CC45FBF3" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_30F6D7ECEA773FF89816E0F3CC45466A" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_2BD8A815A16E52845E46E0F3CC45FBF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_6EF0BC1C638906626070E0F3CC4572F0" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_30F6D7ECEA773FF89816E0F3CC45466A" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_6EF0BC1C638906626070E0F3CC4572F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_AE66A2F08FC60C8330B3E0F3CC55E097" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_30F6D7ECEA773FF89816E0F3CC45466A" xlink:to="loc_us-gaap_Goodwill_AE66A2F08FC60C8330B3E0F3CC55E097" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_721E598BEFFF3EE7180DE0F3CC5576C7" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_30F6D7ECEA773FF89816E0F3CC45466A" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_721E598BEFFF3EE7180DE0F3CC5576C7" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CommitmentsAndContingencies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_D703B8FEEB16482831D5D6C35F11B847" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_BBAD92B8417BE29E870CD6C35F118D0F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_D703B8FEEB16482831D5D6C35F11B847" xlink:to="loc_us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_BBAD92B8417BE29E870CD6C35F118D0F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CommitmentsAndContingenciesLeaseNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_0859CADD95BC210E3FB4D6C35ECE6938" xlink:type="locator" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_CapitalLeasedAssetsInterestRate" xlink:label="loc_qlys_CapitalLeasedAssetsInterestRate_CFA644BE4051D83FD3DDD6C35ECE333B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CommitmentsAndContingenciesDisclosureAbstract_0859CADD95BC210E3FB4D6C35ECE6938" xlink:to="loc_qlys_CapitalLeasedAssetsInterestRate_CFA644BE4051D83FD3DDD6C35ECE333B" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CompanyAndSummaryOfSignificantAccountingPolicies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_6F7E27326CA49555C02ED6C35E9FA880" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="loc_us-gaap_SignificantAccountingPoliciesTextBlock_E9B552B8C622070003DDD6C35E9FF237" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_6F7E27326CA49555C02ED6C35E9FA880" xlink:to="loc_us-gaap_SignificantAccountingPoliciesTextBlock_E9B552B8C622070003DDD6C35E9FF237" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CompanyAndSummaryOfSignificantAccountingPoliciesNonmarketableSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsAllOtherInvestmentsAbstract" xlink:label="loc_us-gaap_InvestmentsAllOtherInvestmentsAbstract_8117E49654D4E68753CAE8168D5C25DD" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_474313316C15FCC0BD3EE81690119899" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsAllOtherInvestmentsAbstract_8117E49654D4E68753CAE8168D5C25DD" xlink:to="loc_us-gaap_StatementTable_474313316C15FCC0BD3EE81690119899" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_A8012EB33DC886A68CF7E816902FFAAF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_474313316C15FCC0BD3EE81690119899" xlink:to="loc_us-gaap_InvestmentTypeAxis_A8012EB33DC886A68CF7E816902FFAAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_A53BD6853F5BAE2AECBAE8169035A5D1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentTypeAxis_A8012EB33DC886A68CF7E816902FFAAF" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_A53BD6853F5BAE2AECBAE8169035A5D1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaap_PreferredStockMember_684143978C4EC3009DC8E816B394E493" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_A53BD6853F5BAE2AECBAE8169035A5D1" xlink:to="loc_us-gaap_PreferredStockMember_684143978C4EC3009DC8E816B394E493" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConvertibleDebtSecuritiesMember" xlink:label="loc_us-gaap_ConvertibleDebtSecuritiesMember_378BE2709EDE3C96552BE816904A50E6" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_A53BD6853F5BAE2AECBAE8169035A5D1" xlink:to="loc_us-gaap_ConvertibleDebtSecuritiesMember_378BE2709EDE3C96552BE816904A50E6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_3763E276E0D82DF51378E81690128EE0" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_474313316C15FCC0BD3EE81690119899" xlink:to="loc_us-gaap_StatementLineItems_3763E276E0D82DF51378E81690128EE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_286C233B03D70259C6F9E816B3729C15" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3763E276E0D82DF51378E81690128EE0" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_286C233B03D70259C6F9E816B3729C15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Investments" xlink:label="loc_us-gaap_Investments_744D4A5F2A5A8AF8406BE8169021F227" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3763E276E0D82DF51378E81690128EE0" xlink:to="loc_us-gaap_Investments_744D4A5F2A5A8AF8406BE8169021F227" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairmentOfInvestments" xlink:label="loc_us-gaap_ImpairmentOfInvestments_0C4F07A5A6BF12558F50E8177EF97DF5" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3763E276E0D82DF51378E81690128EE0" xlink:to="loc_us-gaap_ImpairmentOfInvestments_0C4F07A5A6BF12558F50E8177EF97DF5" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CompanyAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="loc_us-gaap_AccountingPoliciesAbstract_D63B8577A88D67FFBD75D6C35EBF664C" xlink:type="locator" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_DescriptionOfBusinessPolicyPolicyTextBlock" xlink:label="loc_qlys_DescriptionOfBusinessPolicyPolicyTextBlock_FA517DF583C24ADD6987D6C35EBFD6D5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_D63B8577A88D67FFBD75D6C35EBF664C" xlink:to="loc_qlys_DescriptionOfBusinessPolicyPolicyTextBlock_FA517DF583C24ADD6987D6C35EBFD6D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_C18BE2DD4C6CAF307940D6C35EBF2412" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_D63B8577A88D67FFBD75D6C35EBF664C" xlink:to="loc_us-gaap_BasisOfAccountingPolicyPolicyTextBlock_C18BE2DD4C6CAF307940D6C35EBF2412" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_FC199425D47D1E46CF3DD6C35EBF1CC5" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_D63B8577A88D67FFBD75D6C35EBF664C" xlink:to="loc_us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_FC199425D47D1E46CF3DD6C35EBF1CC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueOfFinancialInstrumentsPolicy" xlink:label="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy_A594F31E609E354F345FD6C35EBF7A4B" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccountingPoliciesAbstract_D63B8577A88D67FFBD75D6C35EBF664C" xlink:to="loc_us-gaap_FairValueOfFinancialInstrumentsPolicy_A594F31E609E354F345FD6C35EBF7A4B" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CondensedConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_D7725713A0EC62F268C0E14A4628FB7A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsAbstract" xlink:label="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_D7725713A0EC62F268C0E14A4628FB7A" xlink:to="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrentAbstract" xlink:label="loc_us-gaap_AssetsCurrentAbstract_1838CE1A2025038D403EE14A46299571" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_AssetsCurrentAbstract_1838CE1A2025038D403EE14A46299571" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_13E1F9FA217412CB6514E14A4629D789" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_1838CE1A2025038D403EE14A46299571" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_13E1F9FA217412CB6514E14A4629D789" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MarketableSecuritiesCurrent" xlink:label="loc_us-gaap_MarketableSecuritiesCurrent_2080EC8571B4F333A41DE14A462A659B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_1838CE1A2025038D403EE14A46299571" xlink:to="loc_us-gaap_MarketableSecuritiesCurrent_2080EC8571B4F333A41DE14A462A659B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_728C98E0AA177DE9EDC3E14A462A7751" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_1838CE1A2025038D403EE14A46299571" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_728C98E0AA177DE9EDC3E14A462A7751" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_13903D31368C58AE3C3FE14A462A9D12" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_1838CE1A2025038D403EE14A46299571" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_13903D31368C58AE3C3FE14A462A9D12" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_575B5E2CF9B5F612AA5CE14A462B4033" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsCurrentAbstract_1838CE1A2025038D403EE14A46299571" xlink:to="loc_us-gaap_AssetsCurrent_575B5E2CF9B5F612AA5CE14A462B4033" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MarketableSecuritiesNoncurrent" xlink:label="loc_us-gaap_MarketableSecuritiesNoncurrent_EDC39509A66DC7DB4CFAE14A462BBFE8" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_MarketableSecuritiesNoncurrent_EDC39509A66DC7DB4CFAE14A462BBFE8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_D1AEC4B8AC4A76749EC4E14A462B2247" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_D1AEC4B8AC4A76749EC4E14A462B2247" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_BD56BA6E7CBAE5AB7459E14A462B787D" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_BD56BA6E7CBAE5AB7459E14A462B787D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_AB834D148888681B6196E18A97600C31" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_AB834D148888681B6196E18A97600C31" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_277AAA95F8A2CC709493E14A462CA293" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_277AAA95F8A2CC709493E14A462CA293" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LongTermInvestments" xlink:label="loc_us-gaap_LongTermInvestments_1CB890D7D4CDC9F6304AE14A462CEE04" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_LongTermInvestments_1CB890D7D4CDC9F6304AE14A462CEE04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_39C8AAA2F359E9714B13E14A462C2C52" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_Goodwill_39C8AAA2F359E9714B13E14A462C2C52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsNoncurrent" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_D25A2C52B95483A93AF6E14A462C8314" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_D25A2C52B95483A93AF6E14A462C8314" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_36EC26A61703AE9EE048E14A462CC4D6" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_36EC26A61703AE9EE048E14A462CC4D6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_81332D451DA4AD9051EFE14A462D997C" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AssetsAbstract_66555456F4CBF124998BE14A4629E7BF" xlink:to="loc_us-gaap_Assets_81332D451DA4AD9051EFE14A462D997C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E0D774F42A19345C7B57E14A462D0BBE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_D7725713A0EC62F268C0E14A4628FB7A" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E0D774F42A19345C7B57E14A462D0BBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_624A3C629110286E3FD5E14A462DB7B2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E0D774F42A19345C7B57E14A462D0BBE" xlink:to="loc_us-gaap_LiabilitiesCurrentAbstract_624A3C629110286E3FD5E14A462DB7B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_5B82CD7A99D51A667457E14A462D052A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_624A3C629110286E3FD5E14A462DB7B2" xlink:to="loc_us-gaap_AccountsPayableCurrent_5B82CD7A99D51A667457E14A462D052A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_2E211BED0F010DE07598E14A462EBE6E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_624A3C629110286E3FD5E14A462DB7B2" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_2E211BED0F010DE07598E14A462EBE6E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_D1CA19F881F327CFC50CE14A462EF053" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_624A3C629110286E3FD5E14A462DB7B2" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_D1CA19F881F327CFC50CE14A462EF053" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_FDC03BFA3D88AA21FFE4E14A462E63C3" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_624A3C629110286E3FD5E14A462DB7B2" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_FDC03BFA3D88AA21FFE4E14A462E63C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_0B61D3B2515777E0961CE14A462ED572" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_624A3C629110286E3FD5E14A462DB7B2" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_0B61D3B2515777E0961CE14A462ED572" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_1BB4ECEE053A0122FBA0E14A462E8B81" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_624A3C629110286E3FD5E14A462DB7B2" xlink:to="loc_us-gaap_LiabilitiesCurrent_1BB4ECEE053A0122FBA0E14A462E8B81" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_F15828666966DA08B0DBE14A462F1D9D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E0D774F42A19345C7B57E14A462D0BBE" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_F15828666966DA08B0DBE14A462F1D9D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherLiabilitiesNoncurrent" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_AAD76458BD3282AED42AE14A462FF49D" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E0D774F42A19345C7B57E14A462D0BBE" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_AAD76458BD3282AED42AE14A462FF49D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaap_Liabilities_30E1BA878479EFB832EDE14A4630DFBA" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E0D774F42A19345C7B57E14A462D0BBE" xlink:to="loc_us-gaap_Liabilities_30E1BA878479EFB832EDE14A4630DFBA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaap_CommitmentsAndContingencies_D8954EE85E48C3588BD6E14A46301EC3" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E0D774F42A19345C7B57E14A462D0BBE" xlink:to="loc_us-gaap_CommitmentsAndContingencies_D8954EE85E48C3588BD6E14A46301EC3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_EC86F9844AC24B2404E0E14A4630B03E" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E0D774F42A19345C7B57E14A462D0BBE" xlink:to="loc_us-gaap_StockholdersEquityAbstract_EC86F9844AC24B2404E0E14A4630B03E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_9FA2882C986CAA159152E14A4630F9E9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_EC86F9844AC24B2404E0E14A4630B03E" xlink:to="loc_us-gaap_PreferredStockValue_9FA2882C986CAA159152E14A4630F9E9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_2A82DF1C9442320C38B4E14A46313EFA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_EC86F9844AC24B2404E0E14A4630B03E" xlink:to="loc_us-gaap_CommonStockValue_2A82DF1C9442320C38B4E14A46313EFA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaap_AdditionalPaidInCapital_14AA00CEC8884F83B34AE14A463140BD" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_EC86F9844AC24B2404E0E14A4630B03E" xlink:to="loc_us-gaap_AdditionalPaidInCapital_14AA00CEC8884F83B34AE14A463140BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1BB640FD54BF4DB93E6BE14A4631ABE2" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_EC86F9844AC24B2404E0E14A4630B03E" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1BB640FD54BF4DB93E6BE14A4631ABE2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_4409EFAEC004D9CD3D2BE14A4631682C" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_EC86F9844AC24B2404E0E14A4630B03E" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_4409EFAEC004D9CD3D2BE14A4631682C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_66AFFCF1E7C7CCEE0BC9E14A4631D4EE" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StockholdersEquityAbstract_EC86F9844AC24B2404E0E14A4630B03E" xlink:to="loc_us-gaap_StockholdersEquity_66AFFCF1E7C7CCEE0BC9E14A4631D4EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_12B9DF5CA0311825A6D8E14A46326CF5" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_E0D774F42A19345C7B57E14A462D0BBE" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_12B9DF5CA0311825A6D8E14A46326CF5" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CondensedConsolidatedBalanceSheetsParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="loc_us-gaap_StatementOfFinancialPositionAbstract_2AD71F6561F02846892DD6C35EE6CE75" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllowanceForDoubtfulAccountsReceivable" xlink:label="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_E9973FEAA2145BD9B447D6C35EE62A9F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_2AD71F6561F02846892DD6C35EE6CE75" xlink:to="loc_us-gaap_AllowanceForDoubtfulAccountsReceivable_E9973FEAA2145BD9B447D6C35EE62A9F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_7E96A25F88FB0386B4B5D6C35EE705D7" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_2AD71F6561F02846892DD6C35EE6CE75" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_7E96A25F88FB0386B4B5D6C35EE705D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesAuthorized" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_AC6D3AFE8B00DC854B9BD6C35EE7F427" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_2AD71F6561F02846892DD6C35EE6CE75" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_AC6D3AFE8B00DC854B9BD6C35EE7F427" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesIssued" xlink:label="loc_us-gaap_PreferredStockSharesIssued_293CD4EF173922032D35D6C35EE73AF2" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_2AD71F6561F02846892DD6C35EE6CE75" xlink:to="loc_us-gaap_PreferredStockSharesIssued_293CD4EF173922032D35D6C35EE73AF2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockSharesOutstanding" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_05B6912DBFB91D147826D6C35EE7305C" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_2AD71F6561F02846892DD6C35EE6CE75" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_05B6912DBFB91D147826D6C35EE7305C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_21758D3884F4F8C21B2CD6C35EE7B01C" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_2AD71F6561F02846892DD6C35EE6CE75" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_21758D3884F4F8C21B2CD6C35EE7B01C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesAuthorized" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_1822770190A7F5E125EDD6C35EE78812" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_2AD71F6561F02846892DD6C35EE6CE75" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_1822770190A7F5E125EDD6C35EE78812" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesIssued" xlink:label="loc_us-gaap_CommonStockSharesIssued_11C94A301C407E3A36F2D6C35EE7A4B1" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_2AD71F6561F02846892DD6C35EE6CE75" xlink:to="loc_us-gaap_CommonStockSharesIssued_11C94A301C407E3A36F2D6C35EE7A4B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_061F9F9EAB587BDADDA8D6C35EE85B2B" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfFinancialPositionAbstract_2AD71F6561F02846892DD6C35EE6CE75" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_061F9F9EAB587BDADDA8D6C35EE85B2B" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CondensedConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="loc_us-gaap_StatementOfCashFlowsAbstract_CF8A6DD448E6A78517F6E7FDBE1852EE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_7525AA04D739FE0618B1E7FDBE186A42" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_CF8A6DD448E6A78517F6E7FDBE1852EE" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_7525AA04D739FE0618B1E7FDBE186A42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_371F7A378AB1A1DF8864E7FDBE188893" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_7525AA04D739FE0618B1E7FDBE186A42" xlink:to="loc_us-gaap_NetIncomeLoss_371F7A378AB1A1DF8864E7FDBE188893" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_E07F32D569574C68ABE9E7FDBE18B595" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_CF8A6DD448E6A78517F6E7FDBE1852EE" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_E07F32D569574C68ABE9E7FDBE18B595" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_1C06C1FCB9B50A24AD33E7FDBE19903E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_E07F32D569574C68ABE9E7FDBE18B595" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_1C06C1FCB9B50A24AD33E7FDBE19903E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_6433326F13AC449D57B2E7FDBE19D6CA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_E07F32D569574C68ABE9E7FDBE18B595" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_6433326F13AC449D57B2E7FDBE19D6CA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_013001CF16CB2678BC4DE7FDBE19EE48" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_E07F32D569574C68ABE9E7FDBE18B595" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_013001CF16CB2678BC4DE7FDBE19EE48" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_2C7AE6C8AEFE8382B6C1E7FDBE190312" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_E07F32D569574C68ABE9E7FDBE18B595" xlink:to="loc_us-gaap_ShareBasedCompensation_2C7AE6C8AEFE8382B6C1E7FDBE190312" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_A15C722C1FA4548007DEE7FDBE190976" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_E07F32D569574C68ABE9E7FDBE18B595" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_A15C722C1FA4548007DEE7FDBE190976" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredIncomeTaxesAndTaxCredits" xlink:label="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_27E5F51925EB34CDDCAAE7FDBE193324" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_E07F32D569574C68ABE9E7FDBE18B595" xlink:to="loc_us-gaap_DeferredIncomeTaxesAndTaxCredits_27E5F51925EB34CDDCAAE7FDBE193324" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOperatingCapitalAbstract" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1C434C441A2809A301F8E7FDBE1AAD2C" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_E07F32D569574C68ABE9E7FDBE18B595" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1C434C441A2809A301F8E7FDBE1AAD2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_1942C8A5F10363FE0147E7FDBE1A2F62" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1C434C441A2809A301F8E7FDBE1AAD2C" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_1942C8A5F10363FE0147E7FDBE1A2F62" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_4D4BBEFAABB4EFD8990DE7FDBE1A8891" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1C434C441A2809A301F8E7FDBE1AAD2C" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_4D4BBEFAABB4EFD8990DE7FDBE1A8891" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_B9EA9AD0CC69E1357A77E7FDBE1A56AA" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1C434C441A2809A301F8E7FDBE1AAD2C" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_B9EA9AD0CC69E1357A77E7FDBE1A56AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_17F6EA47F7CFDFB257AFE7FDBE1A7C4C" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1C434C441A2809A301F8E7FDBE1AAD2C" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_17F6EA47F7CFDFB257AFE7FDBE1A7C4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_BBE043DFB0EC720E153FE7FDBE1A9893" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1C434C441A2809A301F8E7FDBE1AAD2C" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_BBE043DFB0EC720E153FE7FDBE1A9893" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_2C7DFE99409A3D7FB955E7FDBE1B6F91" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_1C434C441A2809A301F8E7FDBE1AAD2C" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_2C7DFE99409A3D7FB955E7FDBE1B6F91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_D3D790495F1707EAE6DEE7FDBE1B9790" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_CF8A6DD448E6A78517F6E7FDBE1852EE" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_D3D790495F1707EAE6DEE7FDBE1B9790" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E40C19DBFBE34C2F5AF4E7FDBE1BC467" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_CF8A6DD448E6A78517F6E7FDBE1852EE" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E40C19DBFBE34C2F5AF4E7FDBE1BC467" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireMarketableSecurities" xlink:label="loc_us-gaap_PaymentsToAcquireMarketableSecurities_890EC6DA6EEDDA059913E7FDBE1B6FE0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E40C19DBFBE34C2F5AF4E7FDBE1BC467" xlink:to="loc_us-gaap_PaymentsToAcquireMarketableSecurities_890EC6DA6EEDDA059913E7FDBE1B6FE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_52B2BA8D08C191CDEF39E7FDBE1B980B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E40C19DBFBE34C2F5AF4E7FDBE1BC467" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_52B2BA8D08C191CDEF39E7FDBE1B980B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_D4C464673A21A2B8B5F3E7FDBE1C4DE0" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E40C19DBFBE34C2F5AF4E7FDBE1BC467" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_D4C464673A21A2B8B5F3E7FDBE1C4DE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesGross" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_ADFAED788AA0DCEEB7D7E7FDBE1CA924" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E40C19DBFBE34C2F5AF4E7FDBE1BC467" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_ADFAED788AA0DCEEB7D7E7FDBE1CA924" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_10CAA734254E62355052E7FDBE1C5C86" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E40C19DBFBE34C2F5AF4E7FDBE1BC467" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_10CAA734254E62355052E7FDBE1C5C86" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0A899ED9F7FBA13C43BFE7FDBE1C0BA8" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_E40C19DBFBE34C2F5AF4E7FDBE1BC467" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0A899ED9F7FBA13C43BFE7FDBE1C0BA8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_EA990BDFFC3ADFD1EC88E7FDBE1C1C9E" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_CF8A6DD448E6A78517F6E7FDBE1852EE" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_EA990BDFFC3ADFD1EC88E7FDBE1C1C9E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_0CA72128D91210144659E7FDBE1C4AEB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_EA990BDFFC3ADFD1EC88E7FDBE1C1C9E" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_0CA72128D91210144659E7FDBE1C4AEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_A18E270A43698CEE4950E7FDBE1DF903" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_EA990BDFFC3ADFD1EC88E7FDBE1C1C9E" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_A18E270A43698CEE4950E7FDBE1DF903" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfLongTermCapitalLeaseObligations" xlink:label="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_970CBE93D9AC2DDF6F91E7FDBE1DF039" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_EA990BDFFC3ADFD1EC88E7FDBE1C1C9E" xlink:to="loc_us-gaap_RepaymentsOfLongTermCapitalLeaseObligations_970CBE93D9AC2DDF6F91E7FDBE1DF039" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_714476B34E7C11498656E7FDBE1D56F1" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_EA990BDFFC3ADFD1EC88E7FDBE1C1C9E" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_714476B34E7C11498656E7FDBE1D56F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_799AA657B679FC56E9DBE7FDBE1D4EEB" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_EA990BDFFC3ADFD1EC88E7FDBE1C1C9E" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_799AA657B679FC56E9DBE7FDBE1D4EEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations_54EF8DF3D57E5D62B7DBE7FDBE1D4F22" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_CF8A6DD448E6A78517F6E7FDBE1852EE" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations_54EF8DF3D57E5D62B7DBE7FDBE1D4F22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_10B9F6FC2CD77397DA3BE7FDBE1DD3B0" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_CF8A6DD448E6A78517F6E7FDBE1852EE" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_10B9F6FC2CD77397DA3BE7FDBE1DD3B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_6AD0D47651CAD5D80ED2E7FDBE1E1560" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_CF8A6DD448E6A78517F6E7FDBE1852EE" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_6AD0D47651CAD5D80ED2E7FDBE1E1560" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_381FB85916D012CCCD4CE7FDBE1E49EC" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfCashFlowsAbstract_CF8A6DD448E6A78517F6E7FDBE1852EE" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_381FB85916D012CCCD4CE7FDBE1E49EC" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CondensedConsolidatedStatementsOfComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_04A415E2ED79DA2C9BFAE14A4605A1A3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_30175CDE4B50DCAF3B95E14A460568E5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_04A415E2ED79DA2C9BFAE14A4605A1A3" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_30175CDE4B50DCAF3B95E14A460568E5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_FBD479C0D7A864E9E9C9E14A46059A49" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_30175CDE4B50DCAF3B95E14A460568E5" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_FBD479C0D7A864E9E9C9E14A46059A49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_6DB5E84AA98AE72DB286E14A46053A05" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_FBD479C0D7A864E9E9C9E14A46059A49" xlink:to="loc_us-gaap_EquityComponentDomain_6DB5E84AA98AE72DB286E14A46053A05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_9113677A72E75D1B2A3FE18E525E582F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_6DB5E84AA98AE72DB286E14A46053A05" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_9113677A72E75D1B2A3FE18E525E582F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember" xlink:label="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_0DF35F8B6D2C0C0D85F7E14A4605EB21" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_6DB5E84AA98AE72DB286E14A46053A05" xlink:to="loc_us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember_0DF35F8B6D2C0C0D85F7E14A4605EB21" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_78D45DE027C6847E2CB0E14A4605D455" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_30175CDE4B50DCAF3B95E14A460568E5" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_78D45DE027C6847E2CB0E14A4605D455" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_1D902275577592B8A91BE14A46059347" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_78D45DE027C6847E2CB0E14A4605D455" xlink:to="loc_us-gaap_NetIncomeLoss_1D902275577592B8A91BE14A46059347" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_D8F2E4D52834F3F70C6CE18DDE50A19F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_78D45DE027C6847E2CB0E14A4605D455" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_D8F2E4D52834F3F70C6CE18DDE50A19F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_4C4B2CF85E58F4C61130E18EEC6EE5AB" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_78D45DE027C6847E2CB0E14A4605D455" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_4C4B2CF85E58F4C61130E18EEC6EE5AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_4FEE011A21B521CEECC1E14A4605CB5C" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_78D45DE027C6847E2CB0E14A4605D455" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_4FEE011A21B521CEECC1E14A4605CB5C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_2DDFD8130BDE159CCABBE14A46053D4B" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_78D45DE027C6847E2CB0E14A4605D455" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_2DDFD8130BDE159CCABBE14A46053D4B" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CondensedConsolidatedStatementsOfComprehensiveIncomeParenthetical" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_AF3692586307F99571D8E14A45F5EEF2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesBeforeReclassificationAdjustmentsTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesBeforeReclassificationAdjustmentsTax_9F8D58CE4C9C875A8AE9E14A45F58F2C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_AF3692586307F99571D8E14A45F5EEF2" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesBeforeReclassificationAdjustmentsTax_9F8D58CE4C9C875A8AE9E14A45F58F2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_5752F644BF1F2975D25CE162EF85D39D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_AF3692586307F99571D8E14A45F5EEF2" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax_5752F644BF1F2975D25CE162EF85D39D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax_0BC8CBEF984380969ACBE14A45F576AE" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_AF3692586307F99571D8E14A45F5EEF2" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax_0BC8CBEF984380969ACBE14A45F576AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_67E0724D7B983C4675AAE14A45F5E9DC" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfIncomeAndComprehensiveIncomeAbstract_AF3692586307F99571D8E14A45F5EEF2" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax_67E0724D7B983C4675AAE14A45F5E9DC" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/CondensedConsolidatedStatementsOfOperations" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementAbstract" xlink:label="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsNoncurrent" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_FA693D5DC6F0E000E4C5E0B11D1F897E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsNoncurrent_FA693D5DC6F0E000E4C5E0B11D1F897E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_3E9AF5D585E138CA7068E0B0F0CE3BB5" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:to="loc_us-gaap_RevenuesAbstract_3E9AF5D585E138CA7068E0B0F0CE3BB5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8F282609F08F8A494E1EE0B0F0CFDCD9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_3E9AF5D585E138CA7068E0B0F0CE3BB5" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_8F282609F08F8A494E1EE0B0F0CFDCD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaap_CostOfRevenue_2AC9B01E3A03072C56BEE0B0F0CF9CC6" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_3E9AF5D585E138CA7068E0B0F0CE3BB5" xlink:to="loc_us-gaap_CostOfRevenue_2AC9B01E3A03072C56BEE0B0F0CF9CC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_4600E5FF65E19A4D9E5BE0B0F0CF4BAA" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenuesAbstract_3E9AF5D585E138CA7068E0B0F0CE3BB5" xlink:to="loc_us-gaap_GrossProfit_4600E5FF65E19A4D9E5BE0B0F0CF4BAA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_4F79A0DE344766B4FD14E0B0F0CF1909" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:to="loc_us-gaap_OperatingExpensesAbstract_4F79A0DE344766B4FD14E0B0F0CF1909" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_2BFE9C04DCF29B61CF1DE0B0F0CFF267" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_4F79A0DE344766B4FD14E0B0F0CF1909" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_2BFE9C04DCF29B61CF1DE0B0F0CFF267" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_6450A7156140A7068952E0B0F0D055B2" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_4F79A0DE344766B4FD14E0B0F0CF1909" xlink:to="loc_us-gaap_SellingAndMarketingExpense_6450A7156140A7068952E0B0F0D055B2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_65D3146217AEE0E7DE34E0B0F0D031B0" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_4F79A0DE344766B4FD14E0B0F0CF1909" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_65D3146217AEE0E7DE34E0B0F0D031B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_FC5F17CBFFEB08C443CEE0B0F0D0C55A" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OperatingExpensesAbstract_4F79A0DE344766B4FD14E0B0F0CF1909" xlink:to="loc_us-gaap_OperatingExpenses_FC5F17CBFFEB08C443CEE0B0F0D0C55A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_412ED4BFD0418D9A10C1E0B0F0D092D6" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:to="loc_us-gaap_OperatingIncomeLoss_412ED4BFD0418D9A10C1E0B0F0D092D6" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_OtherIncomeExpenseNetAbstract" xlink:label="loc_qlys_OtherIncomeExpenseNetAbstract_EDF756B98346BA8F14C1E0B0F0D0D753" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:to="loc_qlys_OtherIncomeExpenseNetAbstract_EDF756B98346BA8F14C1E0B0F0D0D753" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_0E1C7D27BD4CA80B5C55E0B0F0D03BE1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_OtherIncomeExpenseNetAbstract_EDF756B98346BA8F14C1E0B0F0D0D753" xlink:to="loc_us-gaap_InterestExpense_0E1C7D27BD4CA80B5C55E0B0F0D03BE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="loc_us-gaap_InvestmentIncomeInterest_3449AAB0A91FAABBCC72E0B0F0D1E050" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_OtherIncomeExpenseNetAbstract_EDF756B98346BA8F14C1E0B0F0D0D753" xlink:to="loc_us-gaap_InvestmentIncomeInterest_3449AAB0A91FAABBCC72E0B0F0D1E050" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_1168942D4B3BFBB216B4E0B0F0D12464" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_OtherIncomeExpenseNetAbstract_EDF756B98346BA8F14C1E0B0F0D0D753" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_1168942D4B3BFBB216B4E0B0F0D12464" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_B566811C6C7CB73042A9E0B0F0D1C064" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_OtherIncomeExpenseNetAbstract_EDF756B98346BA8F14C1E0B0F0D0D753" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_B566811C6C7CB73042A9E0B0F0D1C064" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_63A0293A7F382D7F1BB6E0B0F0D1BC73" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_63A0293A7F382D7F1BB6E0B0F0D1BC73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_D3BEC2FE53B8448F7502E0B0F0D15ECF" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_D3BEC2FE53B8448F7502E0B0F0D15ECF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_359645452C579827EE15E0B0F0D1429D" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:to="loc_us-gaap_NetIncomeLoss_359645452C579827EE15E0B0F0D1429D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_FE523DFC5AF91F9E44D7E0B0F0D23736" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:to="loc_us-gaap_EarningsPerShareAbstract_FE523DFC5AF91F9E44D7E0B0F0D23736" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_EF5BA729BEA76DA94647E0B0F0D2A043" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_FE523DFC5AF91F9E44D7E0B0F0D23736" xlink:to="loc_us-gaap_EarningsPerShareBasic_EF5BA729BEA76DA94647E0B0F0D2A043" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_F007D68F3004B5E52B60E0B0F0D2FA94" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_FE523DFC5AF91F9E44D7E0B0F0D23736" xlink:to="loc_us-gaap_EarningsPerShareDiluted_F007D68F3004B5E52B60E0B0F0D2FA94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_D8310226EC0E1AB8E970E0B0F0D2EAA7" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementAbstract_06602EF64CB494ED1701E0B0F0CE6111" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_D8310226EC0E1AB8E970E0B0F0D2EAA7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_A6450A18253A78679093E0B0F0D2CC55" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_D8310226EC0E1AB8E970E0B0F0D2EAA7" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_A6450A18253A78679093E0B0F0D2CC55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_98D9DEDAE4638BD4AA6EE0B0F0D38F86" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingAbstract_D8310226EC0E1AB8E970E0B0F0D2EAA7" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_98D9DEDAE4638BD4AA6EE0B0F0D38F86" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="loc_us-gaap_StatementOfStockholdersEquityAbstract_AEEEE0F5BCCC02708CD2E7A5BA313F0E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementTable" xlink:label="loc_us-gaap_StatementTable_EED626165D3E35072D32E7A5BA46E852" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfStockholdersEquityAbstract_AEEEE0F5BCCC02708CD2E7A5BA313F0E" xlink:to="loc_us-gaap_StatementTable_EED626165D3E35072D32E7A5BA46E852" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementEquityComponentsAxis" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_A36BFEE82EC5479B9FC6E7A5BA474175" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_EED626165D3E35072D32E7A5BA46E852" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_A36BFEE82EC5479B9FC6E7A5BA474175" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityComponentDomain" xlink:label="loc_us-gaap_EquityComponentDomain_8B500775DC08CCC4119BE7A5BA477E7A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_A36BFEE82EC5479B9FC6E7A5BA474175" xlink:to="loc_us-gaap_EquityComponentDomain_8B500775DC08CCC4119BE7A5BA477E7A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockMember" xlink:label="loc_us-gaap_CommonStockMember_954829C8295FC861834FE7A5BA483648" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_8B500775DC08CCC4119BE7A5BA477E7A" xlink:to="loc_us-gaap_CommonStockMember_954829C8295FC861834FE7A5BA483648" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_C2336ACFC36AEFBF7BA5E7A5BA489BAE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_8B500775DC08CCC4119BE7A5BA477E7A" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_C2336ACFC36AEFBF7BA5E7A5BA489BAE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4BF6701DA591813F9E42E7A5BA49FC24" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_8B500775DC08CCC4119BE7A5BA477E7A" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4BF6701DA591813F9E42E7A5BA49FC24" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsMember" xlink:label="loc_us-gaap_RetainedEarningsMember_8E559D5A874183148922E7A5BA49674D" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityComponentDomain_8B500775DC08CCC4119BE7A5BA477E7A" xlink:to="loc_us-gaap_RetainedEarningsMember_8E559D5A874183148922E7A5BA49674D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementLineItems" xlink:label="loc_us-gaap_StatementLineItems_3F19291C879257ED18C8E7A5BA495B08" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementTable_EED626165D3E35072D32E7A5BA46E852" xlink:to="loc_us-gaap_StatementLineItems_3F19291C879257ED18C8E7A5BA495B08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementLineItems_3F19291C879257ED18C8E7A5BA495B08" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_D515AD83724C38DDE9FDE7A5BA4A501C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_StockholdersEquity_D515AD83724C38DDE9FDE7A5BA4A501C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_120C619FC9F104E7FF32E7A5BA4A6CEE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_SharesOutstanding_120C619FC9F104E7FF32E7A5BA4A6CEE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_D74CAE14C8AA87B605F2E7A5BA4AD012" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_NetIncomeLoss_D74CAE14C8AA87B605F2E7A5BA4AD012" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_362EA305AC6564F1119FE7A5BA4A5FBE" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_362EA305AC6564F1119FE7A5BA4A5FBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption" xlink:label="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_E21B26FD66E22DEAC1CCE7A5BA4AB5D2" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption_E21B26FD66E22DEAC1CCE7A5BA4AB5D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_851F0FB946A720A928D0E7A5BA4B7AE0" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_851F0FB946A720A928D0E7A5BA4B7AE0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_995DCC11ABE48F8DDA13E7A5BA4BCD5D" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_995DCC11ABE48F8DDA13E7A5BA4BCD5D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_59206648666953594DE8E7A5BA4B80FB" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_59206648666953594DE8E7A5BA4B80FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_1B3A4B2D13B244ECDAF0E7A5BA4BA16B" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_1B3A4B2D13B244ECDAF0E7A5BA4BA16B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodShares_6F9E375405DE81A3DFACE7A5BA4B29BB" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodShares_6F9E375405DE81A3DFACE7A5BA4B29BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="loc_us-gaap_StockRepurchasedDuringPeriodValue_2E9E91DB3383719B725AE7A5BA4B28AC" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_StockRepurchasedDuringPeriodValue_2E9E91DB3383719B725AE7A5BA4B28AC" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AdjustmentToAdditionalPaidInCapitalShareBasedCompensationTaxesRelatedToNetShareSettlementsOfEquityAwards" xlink:label="loc_qlys_AdjustmentToAdditionalPaidInCapitalShareBasedCompensationTaxesRelatedToNetShareSettlementsOfEquityAwards_56525269C4F41400B864E7A5BA51C7A7" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_qlys_AdjustmentToAdditionalPaidInCapitalShareBasedCompensationTaxesRelatedToNetShareSettlementsOfEquityAwards_56525269C4F41400B864E7A5BA51C7A7" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_StockIssuedDuringPeriodSharesRestrictedStockAwardVested" xlink:label="loc_qlys_StockIssuedDuringPeriodSharesRestrictedStockAwardVested_BB46FD95AC7F1839FB46E7A5BA51294D" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_qlys_StockIssuedDuringPeriodSharesRestrictedStockAwardVested_BB46FD95AC7F1839FB46E7A5BA51294D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition_368690FC5038A81E0807E7A5BA51C76C" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalShareBasedCompensationRestrictedStockUnitsRequisiteServicePeriodRecognition_368690FC5038A81E0807E7A5BA51C76C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_7664901A63CEB36A923FE7A5BA51BF98" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_7664901A63CEB36A923FE7A5BA51BF98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaap_StockholdersEquity_0E1BD08E5B2F4C014959E7A5BA51BC94" xlink:type="locator" />
    <link:presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_StockholdersEquity_0E1BD08E5B2F4C014959E7A5BA51BC94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharesOutstanding" xlink:label="loc_us-gaap_SharesOutstanding_14BA4D21E9CDE18AB8EBE7A5BA5123AA" xlink:type="locator" />
    <link:presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_BBFF3C71BDC9155A3B7DE7A5BA4913BB" xlink:to="loc_us-gaap_SharesOutstanding_14BA4D21E9CDE18AB8EBE7A5BA5123AA" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/DocumentAndEntityInformation" xlink:type="extended">
    <link:loc xlink:href="qlys-20200331.xsd#qlys_DocumentAndEntityInformationAbstract" xlink:label="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:type="locator" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_Security12bTitle" xlink:label="loc_dei_Security12bTitle_7A8BD6A84EB2179E4F84EA6E8A6171CF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_Security12bTitle_7A8BD6A84EB2179E4F84EA6E8A6171CF" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="loc_dei_EntityIncorporationStateCountryCode_6D3074155298490D95C7EA6E8A614889" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityIncorporationStateCountryCode_6D3074155298490D95C7EA6E8A614889" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentQuarterlyReport" xlink:label="loc_dei_DocumentQuarterlyReport_CF7D2FC948CFF83AFE3AEA6E8A61A242" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_DocumentQuarterlyReport_CF7D2FC948CFF83AFE3AEA6E8A61A242" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentTransitionReport" xlink:label="loc_dei_DocumentTransitionReport_50462B21FC58B92D6F3AEA6E8A6166EF" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_DocumentTransitionReport_50462B21FC58B92D6F3AEA6E8A6166EF" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityRegistrantName" xlink:label="loc_dei_EntityRegistrantName_9C1094D2B840C6FC55F6EA6E8A6230F7" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityRegistrantName_9C1094D2B840C6FC55F6EA6E8A6230F7" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressAddressLine1" xlink:label="loc_dei_EntityAddressAddressLine1_ED3189207980EC687C62EA6E8A62573C" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityAddressAddressLine1_ED3189207980EC687C62EA6E8A62573C" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CityAreaCode" xlink:label="loc_dei_CityAreaCode_9B4548CD74BE26D33C36EA6E8A62C4D0" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_CityAreaCode_9B4548CD74BE26D33C36EA6E8A62C4D0" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_LocalPhoneNumber" xlink:label="loc_dei_LocalPhoneNumber_C6AFE00022A2A329B12EEA6E8A62C5EC" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_LocalPhoneNumber_C6AFE00022A2A329B12EEA6E8A62C5EC" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCurrentReportingStatus" xlink:label="loc_dei_EntityCurrentReportingStatus_06C4530F30EDDCC4B324EA6E8A62FDE5" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityCurrentReportingStatus_06C4530F30EDDCC4B324EA6E8A62FDE5" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityInteractiveDataCurrent" xlink:label="loc_dei_EntityInteractiveDataCurrent_D9B606E8EA7B8C15C120EA6E8A62BF25" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityInteractiveDataCurrent_D9B606E8EA7B8C15C120EA6E8A62BF25" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityShellCompany" xlink:label="loc_dei_EntityShellCompany_F684B0F4C0B5AC71B189EA6E8A622806" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityShellCompany_F684B0F4C0B5AC71B189EA6E8A622806" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCentralIndexKey" xlink:label="loc_dei_EntityCentralIndexKey_3C8670D807A2845088FEEA6E8A6375E9" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityCentralIndexKey_3C8670D807A2845088FEEA6E8A6375E9" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentType" xlink:label="loc_dei_DocumentType_21DC0B5423F4DF7BCAEDEA6E8A63E6EA" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_DocumentType_21DC0B5423F4DF7BCAEDEA6E8A63E6EA" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFileNumber" xlink:label="loc_dei_EntityFileNumber_DBB606492108E4752386EA6E8A6317BA" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityFileNumber_DBB606492108E4752386EA6E8A6317BA" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentPeriodEndDate" xlink:label="loc_dei_DocumentPeriodEndDate_56CC01607BE110F536BBEA6E8A6326CC" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_DocumentPeriodEndDate_56CC01607BE110F536BBEA6E8A6326CC" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_AmendmentFlag" xlink:label="loc_dei_AmendmentFlag_20CB59525E532D87A536EA6E8A63825A" xlink:type="locator" />
    <link:presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_AmendmentFlag_20CB59525E532D87A536EA6E8A63825A" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalYearFocus" xlink:label="loc_dei_DocumentFiscalYearFocus_7D98D0677773FF698528EA6E8A634E0A" xlink:type="locator" />
    <link:presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_DocumentFiscalYearFocus_7D98D0677773FF698528EA6E8A634E0A" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="loc_dei_DocumentFiscalPeriodFocus_480D19CA2D0B685EBAB1EA6E8A637AC0" xlink:type="locator" />
    <link:presentationArc order="18" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_DocumentFiscalPeriodFocus_480D19CA2D0B685EBAB1EA6E8A637AC0" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_CurrentFiscalYearEndDate" xlink:label="loc_dei_CurrentFiscalYearEndDate_A3E4792E92500409315FEA6E8A644220" xlink:type="locator" />
    <link:presentationArc order="19" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_CurrentFiscalYearEndDate_A3E4792E92500409315FEA6E8A644220" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityFilerCategory" xlink:label="loc_dei_EntityFilerCategory_BA45245BF1301677A411EA6E8A648AE5" xlink:type="locator" />
    <link:presentationArc order="20" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityFilerCategory_BA45245BF1301677A411EA6E8A648AE5" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_0DF5A2E42369085E5D8DEA6E8A64B96D" xlink:type="locator" />
    <link:presentationArc order="21" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_0DF5A2E42369085E5D8DEA6E8A64B96D" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityTaxIdentificationNumber" xlink:label="loc_dei_EntityTaxIdentificationNumber_659A0BB4201EAF037A80EA6E8A64CBA2" xlink:type="locator" />
    <link:presentationArc order="22" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityTaxIdentificationNumber_659A0BB4201EAF037A80EA6E8A64CBA2" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_TradingSymbol" xlink:label="loc_dei_TradingSymbol_177AC2C24DDE433CAFE6EA6E8A64DD81" xlink:type="locator" />
    <link:presentationArc order="23" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_TradingSymbol_177AC2C24DDE433CAFE6EA6E8A64DD81" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_SecurityExchangeName" xlink:label="loc_dei_SecurityExchangeName_8DDC9F7DE8CDA5F74DF9EA6E8A64E495" xlink:type="locator" />
    <link:presentationArc order="24" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_SecurityExchangeName_8DDC9F7DE8CDA5F74DF9EA6E8A64E495" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntitySmallBusiness" xlink:label="loc_dei_EntitySmallBusiness_70E2A8BBA4E4BBB019F1EA6E8A64977E" xlink:type="locator" />
    <link:presentationArc order="25" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntitySmallBusiness_70E2A8BBA4E4BBB019F1EA6E8A64977E" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityEmergingGrowthCompany" xlink:label="loc_dei_EntityEmergingGrowthCompany_ABADB1EE998928A4F776EA6E8A651A01" xlink:type="locator" />
    <link:presentationArc order="26" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityEmergingGrowthCompany_ABADB1EE998928A4F776EA6E8A651A01" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressCityOrTown" xlink:label="loc_dei_EntityAddressCityOrTown_959D69502F23BA608D37EA6E8A65F3F1" xlink:type="locator" />
    <link:presentationArc order="27" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityAddressCityOrTown_959D69502F23BA608D37EA6E8A65F3F1" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressStateOrProvince" xlink:label="loc_dei_EntityAddressStateOrProvince_B34986848EB4D5B28495EA6E8A6599A5" xlink:type="locator" />
    <link:presentationArc order="28" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityAddressStateOrProvince_B34986848EB4D5B28495EA6E8A6599A5" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.xsd#dei_EntityAddressPostalZipCode" xlink:label="loc_dei_EntityAddressPostalZipCode_56BE08F748138DD96527EA6E8A656849" xlink:type="locator" />
    <link:presentationArc order="29" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DocumentAndEntityInformationAbstract_BFFE19322D8B63BAAE57EA6E8A6101AC" xlink:to="loc_dei_EntityAddressPostalZipCode_56BE08F748138DD96527EA6E8A656849" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/FairValueOfFinancialInstruments" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_3D3B603042C642F4774CD6C35F5B265A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="loc_us-gaap_FairValueDisclosuresTextBlock_EC9B8881E5E5AFD98487D6C35F5B0C7E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_3D3B603042C642F4774CD6C35F5B265A" xlink:to="loc_us-gaap_FairValueDisclosuresTextBlock_EC9B8881E5E5AFD98487D6C35F5B0C7E" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/FairValueOfFinancialInstrumentsAdditionalInformationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_9DF0DF7D9D142D3B6FBCE196487D9640" xlink:type="locator" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_MarketableSecuritiesSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions" xlink:label="loc_qlys_MarketableSecuritiesSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions_303CD1B1FC95C280C7A4E196487E1411" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_9DF0DF7D9D142D3B6FBCE196487D9640" xlink:to="loc_qlys_MarketableSecuritiesSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions_303CD1B1FC95C280C7A4E196487E1411" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/FairValueOfFinancialInstrumentsCashAndCashEquivalentsAvailableForSaleSecuritiesReconciliationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_B75167D68D38B891C0F9EB17D6A4A642" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByBalanceSheetGroupingTable" xlink:label="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5653F9CBB43FF35229A9EB17D6A4A429" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_B75167D68D38B891C0F9EB17D6A4A642" xlink:to="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5653F9CBB43FF35229A9EB17D6A4A429" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_1CA57C666587034D3F65EB17D6A5DC6F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5653F9CBB43FF35229A9EB17D6A4A429" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_1CA57C666587034D3F65EB17D6A5DC6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_03399429B04E053E1258EB17D6A5FD61" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_1CA57C666587034D3F65EB17D6A5DC6F" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_03399429B04E053E1258EB17D6A5FD61" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AmortizedcostMember" xlink:label="loc_qlys_AmortizedcostMember_ECCBFEC25D0FCD23BD5FEB17D6A53A27" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_03399429B04E053E1258EB17D6A5FD61" xlink:to="loc_qlys_AmortizedcostMember_ECCBFEC25D0FCD23BD5FEB17D6A53A27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashMember" xlink:label="loc_us-gaap_CashMember_28932ED046FFC71073B3EB17D6A6F106" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_03399429B04E053E1258EB17D6A5FD61" xlink:to="loc_us-gaap_CashMember_28932ED046FFC71073B3EB17D6A6F106" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember_20132C5F50B08187D21AEB17D6A63910" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_03399429B04E053E1258EB17D6A5FD61" xlink:to="loc_us-gaap_MoneyMarketFundsMember_20132C5F50B08187D21AEB17D6A63910" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CorporateBondSecuritiesMember" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_98DE590F1B6A53EDDD52EB17D6A61281" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_03399429B04E053E1258EB17D6A5FD61" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_98DE590F1B6A53EDDD52EB17D6A61281" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_697E289576311C039249EB17D6A6E623" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_03399429B04E053E1258EB17D6A5FD61" xlink:to="loc_us-gaap_CommercialPaperMember_697E289576311C039249EB17D6A6E623" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis_965D7CA9B2A8FDD50A6DEB17D6AC01B0" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5653F9CBB43FF35229A9EB17D6A4A429" xlink:to="loc_us-gaap_FinancialInstrumentAxis_965D7CA9B2A8FDD50A6DEB17D6AC01B0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_55E3AA24DD802794993EEB17D6ACDB38" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentAxis_965D7CA9B2A8FDD50A6DEB17D6AC01B0" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_55E3AA24DD802794993EEB17D6ACDB38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_55571A0FD06DD272577BEB17D6AC7358" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_55E3AA24DD802794993EEB17D6ACDB38" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_55571A0FD06DD272577BEB17D6AC7358" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_USTreasuryBillSecuritiesMember" xlink:label="loc_us-gaap_USTreasuryBillSecuritiesMember_3416FF4060F40D10201DEB17D6ACBA2A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_55E3AA24DD802794993EEB17D6ACDB38" xlink:to="loc_us-gaap_USTreasuryBillSecuritiesMember_3416FF4060F40D10201DEB17D6ACBA2A" xlink:type="arc" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_55E3AA24DD802794993EEB17D6ACDB38" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_98DE590F1B6A53EDDD52EB17D6A61281" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_ED2125461F9DC5FEE4D3EB17D6AD671A" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_55E3AA24DD802794993EEB17D6ACDB38" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_ED2125461F9DC5FEE4D3EB17D6AD671A" xlink:type="arc" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_55E3AA24DD802794993EEB17D6ACDB38" xlink:to="loc_us-gaap_MoneyMarketFundsMember_20132C5F50B08187D21AEB17D6A63910" xlink:type="arc" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_55E3AA24DD802794993EEB17D6ACDB38" xlink:to="loc_us-gaap_CommercialPaperMember_697E289576311C039249EB17D6A6E623" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_22624075D6961D8F9CF7EB17D6AD2E05" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5653F9CBB43FF35229A9EB17D6A4A429" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_22624075D6961D8F9CF7EB17D6AD2E05" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_2C37B13FCC701AA728D0EB17D6AE8AE7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_22624075D6961D8F9CF7EB17D6AD2E05" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_2C37B13FCC701AA728D0EB17D6AE8AE7" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_CashAndCashEquivalentsLineItemMember" xlink:label="loc_qlys_CashAndCashEquivalentsLineItemMember_7DF66904CB934E7D6672EB17D6AEEF6C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_2C37B13FCC701AA728D0EB17D6AE8AE7" xlink:to="loc_qlys_CashAndCashEquivalentsLineItemMember_7DF66904CB934E7D6672EB17D6AEEF6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="loc_us-gaap_CashAndCashEquivalentsMember_6831AF354BC8BAFAEAE9EB17D6AE1B32" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_2C37B13FCC701AA728D0EB17D6AE8AE7" xlink:to="loc_us-gaap_CashAndCashEquivalentsMember_6831AF354BC8BAFAEAE9EB17D6AE1B32" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AvailableForSaleSecuritiesLineItemMember" xlink:label="loc_qlys_AvailableForSaleSecuritiesLineItemMember_11700D8D6121B1E9C5D4EB17D6AF9160" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_2C37B13FCC701AA728D0EB17D6AE8AE7" xlink:to="loc_qlys_AvailableForSaleSecuritiesLineItemMember_11700D8D6121B1E9C5D4EB17D6AF9160" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_CurrentAssetsMember" xlink:label="loc_qlys_CurrentAssetsMember_4289A6BDE5AB77B66380EB17D6AFDBE0" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_2C37B13FCC701AA728D0EB17D6AE8AE7" xlink:to="loc_qlys_CurrentAssetsMember_4289A6BDE5AB77B66380EB17D6AFDBE0" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_NoncurrentAssetsMember" xlink:label="loc_qlys_NoncurrentAssetsMember_0E3200F765B11D8EEADAEB17D6AFBE0D" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_2C37B13FCC701AA728D0EB17D6AE8AE7" xlink:to="loc_qlys_NoncurrentAssetsMember_0E3200F765B11D8EEADAEB17D6AFBE0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_059494DF8C9DA954CC2BEB17D6AF36D2" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5653F9CBB43FF35229A9EB17D6A4A429" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_059494DF8C9DA954CC2BEB17D6AF36D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A67F72E1A8518436CBADEB17D6B0EA53" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_059494DF8C9DA954CC2BEB17D6AF36D2" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A67F72E1A8518436CBADEB17D6B0EA53" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_D95D6633DDA2BB8629BCEB17D6B05173" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A67F72E1A8518436CBADEB17D6B0EA53" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_D95D6633DDA2BB8629BCEB17D6B05173" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_C3035F9A836972579811EB17D6B0F956" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A67F72E1A8518436CBADEB17D6B0EA53" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_C3035F9A836972579811EB17D6B0F956" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_BB4E18259ED729B824E2EB17D6B13924" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A67F72E1A8518436CBADEB17D6B0EA53" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_BB4E18259ED729B824E2EB17D6B13924" xlink:type="arc" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_A67F72E1A8518436CBADEB17D6B0EA53" xlink:to="loc_qlys_AmortizedcostMember_ECCBFEC25D0FCD23BD5FEB17D6A53A27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems" xlink:label="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4A56C8A28E7184F45FE8EB17D6B11D37" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByBalanceSheetGroupingTable_5653F9CBB43FF35229A9EB17D6A4A429" xlink:to="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4A56C8A28E7184F45FE8EB17D6B11D37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract" xlink:label="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueBalanceSheetGroupingFinancialStatementCaptionsLineItems_4A56C8A28E7184F45FE8EB17D6B11D37" xlink:to="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_2304AFA016AE06092249EB17D6B1CA30" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_2304AFA016AE06092249EB17D6B1CA30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_4AFF3FE1AF81439B57AFEB17D6B21766" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_4AFF3FE1AF81439B57AFEB17D6B21766" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_7B7F32B2D8B295A4F899EB17D6B7DB1A" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_7B7F32B2D8B295A4F899EB17D6B7DB1A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesCurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesCurrent_0726390C51E31F69E05DEB17D6B71422" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesCurrent_0726390C51E31F69E05DEB17D6B71422" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsFairValueDisclosure" xlink:label="loc_us-gaap_InvestmentsFairValueDisclosure_56840D7EC47C6E0752CDEB17D6B7C726" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_InvestmentsFairValueDisclosure_56840D7EC47C6E0752CDEB17D6B7C726" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_USGovernmentAgenciesSecuritiesAtCarryingValue" xlink:label="loc_us-gaap_USGovernmentAgenciesSecuritiesAtCarryingValue_72376FD3DE68D8182442EB17D6B7D268" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_USGovernmentAgenciesSecuritiesAtCarryingValue_72376FD3DE68D8182442EB17D6B7D268" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialPaperAtCarryingValue" xlink:label="loc_us-gaap_CommercialPaperAtCarryingValue_E52736C1A5E46388D5B4EB17D6B882F3" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_CommercialPaperAtCarryingValue_E52736C1A5E46388D5B4EB17D6B882F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetBackedSecuritiesAtCarryingValue" xlink:label="loc_us-gaap_AssetBackedSecuritiesAtCarryingValue_B7B4084E2F603418FE8AEB17D6B84BF4" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_AssetBackedSecuritiesAtCarryingValue_B7B4084E2F603418FE8AEB17D6B84BF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MoneyMarketFundsAtCarryingValue" xlink:label="loc_us-gaap_MoneyMarketFundsAtCarryingValue_40301E3CF731D63AB4ADEB17D6B895D7" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_MoneyMarketFundsAtCarryingValue_40301E3CF731D63AB4ADEB17D6B895D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_C118E917910D6B855BE2EB17D6B8D6D7" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_C118E917910D6B855BE2EB17D6B8D6D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAmortizedCost" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_B5BDACA3630460ADAC94EB17D6B8BACB" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAmortizedCost_B5BDACA3630460ADAC94EB17D6B8BACB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_C9D7BC1D0F81A6D93BD5EB17D6B81338" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_C9D7BC1D0F81A6D93BD5EB17D6B81338" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_A024C9BE40466BABD539EB17D6B8A802" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentsFinancialAssetsBalanceSheetGroupingsAbstract_809C7AAB462469FB88DBEB17D6B1276D" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_A024C9BE40466BABD539EB17D6B8A802" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/FairValueOfFinancialInstrumentsChangesInAccumulatedOtherComprehensiveIncomeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StatementOfOtherComprehensiveIncomeAbstract" xlink:label="loc_us-gaap_StatementOfOtherComprehensiveIncomeAbstract_5B7BB51638AD96E3E806EAB4EBEC94DC" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_20404DBBD3F60B5BC044EAB4EBF121D7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_StatementOfOtherComprehensiveIncomeAbstract_5B7BB51638AD96E3E806EAB4EBEC94DC" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_20404DBBD3F60B5BC044EAB4EBF121D7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NatureOfExpenseAxis" xlink:label="loc_us-gaap_NatureOfExpenseAxis_5D9F73DAFD24E20D054BEAB4EBF4B7E0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_20404DBBD3F60B5BC044EAB4EBF121D7" xlink:to="loc_us-gaap_NatureOfExpenseAxis_5D9F73DAFD24E20D054BEAB4EBF4B7E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_02F456D7082B5C235BCCEAB4EBF4C627" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NatureOfExpenseAxis_5D9F73DAFD24E20D054BEAB4EBF4B7E0" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_02F456D7082B5C235BCCEAB4EBF4C627" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_OtherincomeexpenseMember" xlink:label="loc_qlys_OtherincomeexpenseMember_F23385CCDB564ED004B6EAB4EBF4952A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_02F456D7082B5C235BCCEAB4EBF4C627" xlink:to="loc_qlys_OtherincomeexpenseMember_F23385CCDB564ED004B6EAB4EBF4952A" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_RevenuesMember" xlink:label="loc_qlys_RevenuesMember_972F56C1492C921ED393EAB4EBF5CD61" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_02F456D7082B5C235BCCEAB4EBF4C627" xlink:to="loc_qlys_RevenuesMember_972F56C1492C921ED393EAB4EBF5CD61" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_BC5417C0E228EEC63997EAB4EBF5C7A6" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_20404DBBD3F60B5BC044EAB4EBF121D7" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_BC5417C0E228EEC63997EAB4EBF5C7A6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_B8E84383DC5606B91341EAB4EBF5CCE1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_BC5417C0E228EEC63997EAB4EBF5C7A6" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_B8E84383DC5606B91341EAB4EBF5CCE1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForwardContractsMember" xlink:label="loc_us-gaap_ForwardContractsMember_3AC984B788D4CF1109F0EAB4EBF6BC2A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_B8E84383DC5606B91341EAB4EBF5CCE1" xlink:to="loc_us-gaap_ForwardContractsMember_3AC984B788D4CF1109F0EAB4EBF6BC2A" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ForeignCurrencyContractEuroMember" xlink:label="loc_qlys_ForeignCurrencyContractEuroMember_AF45E0AA8D29D4729043EAB4EBF62E7C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_B8E84383DC5606B91341EAB4EBF5CCE1" xlink:to="loc_qlys_ForeignCurrencyContractEuroMember_AF45E0AA8D29D4729043EAB4EBF62E7C" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ForeignCurrencyContractPoundMember" xlink:label="loc_qlys_ForeignCurrencyContractPoundMember_FF6A04112F2B4F764E2FEAB4EBF6F622" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_B8E84383DC5606B91341EAB4EBF5CCE1" xlink:to="loc_qlys_ForeignCurrencyContractPoundMember_FF6A04112F2B4F764E2FEAB4EBF6F622" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="loc_us-gaap_ForeignExchangeContractMember_FA92453C9366EF30CB63EAB4EBF66F51" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_B8E84383DC5606B91341EAB4EBF5CCE1" xlink:to="loc_us-gaap_ForeignExchangeContractMember_FA92453C9366EF30CB63EAB4EBF66F51" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ForeignCurrencyContractINRMember" xlink:label="loc_qlys_ForeignCurrencyContractINRMember_45B58F6B2E151CDBC843EAB4EBFC4C91" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_B8E84383DC5606B91341EAB4EBF5CCE1" xlink:to="loc_qlys_ForeignCurrencyContractINRMember_45B58F6B2E151CDBC843EAB4EBFC4C91" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ForeignCurrencyContractEuroandINRMember" xlink:label="loc_qlys_ForeignCurrencyContractEuroandINRMember_6492E076C6625939F018EAB4EBFC7BCB" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_B8E84383DC5606B91341EAB4EBF5CCE1" xlink:to="loc_qlys_ForeignCurrencyContractEuroandINRMember_6492E076C6625939F018EAB4EBFC7BCB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E4CE62FD02D0E9FCB1F0EAB4EBFCD6BC" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_20404DBBD3F60B5BC044EAB4EBF121D7" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E4CE62FD02D0E9FCB1F0EAB4EBFCD6BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_AF8104A397184BD5924EEAB4EBFCF367" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E4CE62FD02D0E9FCB1F0EAB4EBFCD6BC" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossToBeReclassifiedDuringNext12Months_AF8104A397184BD5924EEAB4EBFCF367" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments" xlink:label="loc_us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_1074F32E213A44146AECEAB4EBFCD06C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E4CE62FD02D0E9FCB1F0EAB4EBFCD6BC" xlink:to="loc_us-gaap_UnrealizedGainLossOnCashFlowHedgingInstruments_1074F32E213A44146AECEAB4EBFCD06C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrealizedGainLossOnForeignCurrencyDerivativesNetBeforeTax" xlink:label="loc_us-gaap_UnrealizedGainLossOnForeignCurrencyDerivativesNetBeforeTax_15F569B7DB936FDFF2EBEAB4EBFCD2C0" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E4CE62FD02D0E9FCB1F0EAB4EBFCD6BC" xlink:to="loc_us-gaap_UnrealizedGainLossOnForeignCurrencyDerivativesNetBeforeTax_15F569B7DB936FDFF2EBEAB4EBFCD2C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet" xlink:label="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet_E98692A601C0E9D807DBEAB4EBFDCF99" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E4CE62FD02D0E9FCB1F0EAB4EBFCD6BC" xlink:to="loc_us-gaap_ForeignCurrencyCashFlowHedgeGainLossReclassifiedToEarningsNet_E98692A601C0E9D807DBEAB4EBFDCF99" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_1BF226FEE85412F97634EAB4EBFDA99E" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E4CE62FD02D0E9FCB1F0EAB4EBFCD6BC" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax_1BF226FEE85412F97634EAB4EBFDA99E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_07BCEB29432D1F2F5804EAB4EBFD99FC" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E4CE62FD02D0E9FCB1F0EAB4EBFCD6BC" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax_07BCEB29432D1F2F5804EAB4EBFD99FC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_7916F785565B092D4D25EAB4EBFD4F9B" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_E4CE62FD02D0E9FCB1F0EAB4EBFCD6BC" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax_7916F785565B092D4D25EAB4EBFD4F9B" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/FairValueOfFinancialInstrumentsContractualMaturityDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_E63919DE4D645CC66C0AE19F7EC28051" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_1156247DD9C5528CCEEBE19F7EC350D2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_E63919DE4D645CC66C0AE19F7EC28051" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_1156247DD9C5528CCEEBE19F7EC350D2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis_51C7940AF2195169EAC8E19F7EC337A0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_1156247DD9C5528CCEEBE19F7EC350D2" xlink:to="loc_us-gaap_FinancialInstrumentAxis_51C7940AF2195169EAC8E19F7EC337A0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_853D63635655DE811BE3E19F7EC3236E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentAxis_51C7940AF2195169EAC8E19F7EC337A0" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_853D63635655DE811BE3E19F7EC3236E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_08A277FF65FD0999ED9EE19F7EC3D824" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_853D63635655DE811BE3E19F7EC3236E" xlink:to="loc_us-gaap_CommercialPaperMember_08A277FF65FD0999ED9EE19F7EC3D824" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_90D5C4FA6DEF7933751BE19F7EC4082A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_853D63635655DE811BE3E19F7EC3236E" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_90D5C4FA6DEF7933751BE19F7EC4082A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CorporateBondSecuritiesMember" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_B7A7406563B4EF7677BCE19F7EC490A8" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_853D63635655DE811BE3E19F7EC3236E" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_B7A7406563B4EF7677BCE19F7EC490A8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_C12D8728CF97EBAA404EE19F7EC499A2" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_853D63635655DE811BE3E19F7EC3236E" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_C12D8728CF97EBAA404EE19F7EC499A2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_E688FA80A2733B603A78E19F7EC4319C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_1156247DD9C5528CCEEBE19F7EC350D2" xlink:to="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_E688FA80A2733B603A78E19F7EC4319C" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesNextTwelveMonthsFairValue" xlink:label="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesNextTwelveMonthsFairValue_55E1717E85B3C6427A8EE19F7EC470C5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_E688FA80A2733B603A78E19F7EC4319C" xlink:to="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesNextTwelveMonthsFairValue_55E1717E85B3C6427A8EE19F7EC470C5" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesYearOneThroughTwoFairValue" xlink:label="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesYearOneThroughTwoFairValue_BFCE9C0C9CCB969C0F64E19F7ECA21AA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_E688FA80A2733B603A78E19F7EC4319C" xlink:to="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesYearOneThroughTwoFairValue_BFCE9C0C9CCB969C0F64E19F7ECA21AA" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesAfterYearTwoFairValue" xlink:label="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesAfterYearTwoFairValue_1F1687B187EE205972BCE19F7ECAA0ED" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_E688FA80A2733B603A78E19F7EC4319C" xlink:to="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesAfterYearTwoFairValue_1F1687B187EE205972BCE19F7ECAA0ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_3A7D48020D6E8482AA18E19F7ECA7AD8" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_E688FA80A2733B603A78E19F7EC4319C" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_3A7D48020D6E8482AA18E19F7ECA7AD8" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/FairValueOfFinancialInstrumentsDerivativesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_8B3CBEA59D9DE0F2D05BE7FDBDCE303B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3F76F70A1A95EB4104E3E7FDBDCEDC0D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_8B3CBEA59D9DE0F2D05BE7FDBDCE303B" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3F76F70A1A95EB4104E3E7FDBDCEDC0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_4FD2BBE25F0C634B9A32E8DAE4E201D5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3F76F70A1A95EB4104E3E7FDBDCEDC0D" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_4FD2BBE25F0C634B9A32E8DAE4E201D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_CDF6DF34BDA8EA6D526DE8DAE4E35D12" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_4FD2BBE25F0C634B9A32E8DAE4E201D5" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_CDF6DF34BDA8EA6D526DE8DAE4E35D12" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AmortizedcostMember" xlink:label="loc_qlys_AmortizedcostMember_A24AA8C5F019B3DEB065E8DAE520A815" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_CDF6DF34BDA8EA6D526DE8DAE4E35D12" xlink:to="loc_qlys_AmortizedcostMember_A24AA8C5F019B3DEB065E8DAE520A815" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_1D9956F8089DE569A4AEE7FDBDCE960B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3F76F70A1A95EB4104E3E7FDBDCEDC0D" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_1D9956F8089DE569A4AEE7FDBDCE960B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_A549183C4F0ACE556C99E7FDBDCF3F0A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_1D9956F8089DE569A4AEE7FDBDCE960B" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_A549183C4F0ACE556C99E7FDBDCF3F0A" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ForeignCurrencyContractINRMember" xlink:label="loc_qlys_ForeignCurrencyContractINRMember_062FB0326627225DA755E7FDBDCF3B6B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_A549183C4F0ACE556C99E7FDBDCF3F0A" xlink:to="loc_qlys_ForeignCurrencyContractINRMember_062FB0326627225DA755E7FDBDCF3B6B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForwardContractsMember" xlink:label="loc_us-gaap_ForwardContractsMember_B06ABCD0DEFFAEFE6047E7FDBDCFEB73" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_A549183C4F0ACE556C99E7FDBDCF3F0A" xlink:to="loc_us-gaap_ForwardContractsMember_B06ABCD0DEFFAEFE6047E7FDBDCFEB73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignExchangeContractMember" xlink:label="loc_us-gaap_ForeignExchangeContractMember_E90B5166A888F4D523D4E7FDBDCF3657" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_A549183C4F0ACE556C99E7FDBDCF3F0A" xlink:to="loc_us-gaap_ForeignExchangeContractMember_E90B5166A888F4D523D4E7FDBDCF3657" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ForeignCurrencyContractEuroMember" xlink:label="loc_qlys_ForeignCurrencyContractEuroMember_6F5A79196CC4E76727C3E7FDBDCFCAD9" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_A549183C4F0ACE556C99E7FDBDCF3F0A" xlink:to="loc_qlys_ForeignCurrencyContractEuroMember_6F5A79196CC4E76727C3E7FDBDCFCAD9" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ForeignCurrencyContractPoundMember" xlink:label="loc_qlys_ForeignCurrencyContractPoundMember_F3C3DDC222DF1B69C65CE7FDBDD0C8F0" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_A549183C4F0ACE556C99E7FDBDCF3F0A" xlink:to="loc_qlys_ForeignCurrencyContractPoundMember_F3C3DDC222DF1B69C65CE7FDBDD0C8F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_4A19EF5D77CF25EE1CCCE7FDBDD092C6" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3F76F70A1A95EB4104E3E7FDBDCEDC0D" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_4A19EF5D77CF25EE1CCCE7FDBDD092C6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingRelationshipDomain" xlink:label="loc_us-gaap_HedgingRelationshipDomain_02B79DD7190BF568D19AE7FDBDD054B3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis_4A19EF5D77CF25EE1CCCE7FDBDD092C6" xlink:to="loc_us-gaap_HedgingRelationshipDomain_02B79DD7190BF568D19AE7FDBDD054B3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashFlowHedgingMember" xlink:label="loc_us-gaap_CashFlowHedgingMember_FC9E88F7F66FCE75D8AAE7FDBDD01E2A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingRelationshipDomain_02B79DD7190BF568D19AE7FDBDD054B3" xlink:to="loc_us-gaap_CashFlowHedgingMember_FC9E88F7F66FCE75D8AAE7FDBDD01E2A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_104892B05102625A3A52E7FDBDD0DA9C" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3F76F70A1A95EB4104E3E7FDBDCEDC0D" xlink:to="loc_us-gaap_HedgingDesignationAxis_104892B05102625A3A52E7FDBDD0DA9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_E5FC6CA5C837D2B2E974E7FDBDD16BFF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationAxis_104892B05102625A3A52E7FDBDD0DA9C" xlink:to="loc_us-gaap_HedgingDesignationDomain_E5FC6CA5C837D2B2E974E7FDBDD16BFF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_F4B5FB1578F4DBC27D5DE7FDBDD102EE" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationDomain_E5FC6CA5C837D2B2E974E7FDBDD16BFF" xlink:to="loc_us-gaap_NondesignatedMember_F4B5FB1578F4DBC27D5DE7FDBDD102EE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="loc_us-gaap_DesignatedAsHedgingInstrumentMember_9320CD34120784D3BD75E7FDBDD197B4" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationDomain_E5FC6CA5C837D2B2E974E7FDBDD16BFF" xlink:to="loc_us-gaap_DesignatedAsHedgingInstrumentMember_9320CD34120784D3BD75E7FDBDD197B4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativesFairValueLineItems" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_073B5ACB9CC4EBBD149DE7FDBDD17B29" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3F76F70A1A95EB4104E3E7FDBDCEDC0D" xlink:to="loc_us-gaap_DerivativesFairValueLineItems_073B5ACB9CC4EBBD149DE7FDBDD17B29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_5BE23A80DB1A87D4FECCE8DAE4AD5653" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_073B5ACB9CC4EBBD149DE7FDBDD17B29" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_5BE23A80DB1A87D4FECCE8DAE4AD5653" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeNumberOfInstrumentsHeld" xlink:label="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_8AA1E690C079EB6BAE8DE7FDBDD1FD78" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_073B5ACB9CC4EBBD149DE7FDBDD17B29" xlink:to="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_8AA1E690C079EB6BAE8DE7FDBDD1FD78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_0E72B809D6C9C46E9E13E7FDBDD247DA" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_073B5ACB9CC4EBBD149DE7FDBDD17B29" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_0E72B809D6C9C46E9E13E7FDBDD247DA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyContractAssetFairValueDisclosure" xlink:label="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_E6C534546A542C838037E7FDBDD2E3B5" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_073B5ACB9CC4EBBD149DE7FDBDD17B29" xlink:to="loc_us-gaap_ForeignCurrencyContractAssetFairValueDisclosure_E6C534546A542C838037E7FDBDD2E3B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure" xlink:label="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_F039471900AA8680B07DE7FDBDD26E2F" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_073B5ACB9CC4EBBD149DE7FDBDD17B29" xlink:to="loc_us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure_F039471900AA8680B07DE7FDBDD26E2F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeNotionalAmount" xlink:label="loc_us-gaap_DerivativeNotionalAmount_64F966B8D6ABB146EB23E7FDBDD21FE7" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_073B5ACB9CC4EBBD149DE7FDBDD17B29" xlink:to="loc_us-gaap_DerivativeNotionalAmount_64F966B8D6ABB146EB23E7FDBDD21FE7" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/FairValueOfFinancialInstrumentsFairValueHierarchyDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_E086DB0D4BD1BC1F26DBE7FDBDE03FB7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6DC17570152F3391F923E7FDBDE0A981" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_E086DB0D4BD1BC1F26DBE7FDBDE03FB7" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6DC17570152F3391F923E7FDBDE0A981" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="loc_us-gaap_CashAndCashEquivalentsAxis_CFDED454D5AFD57FB7D8E7FDBDE0F674" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6DC17570152F3391F923E7FDBDE0A981" xlink:to="loc_us-gaap_CashAndCashEquivalentsAxis_CFDED454D5AFD57FB7D8E7FDBDE0F674" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_8B9701919E4323D0896DE7FDBDE0B742" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_CashAndCashEquivalentsAxis_CFDED454D5AFD57FB7D8E7FDBDE0F674" xlink:to="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_8B9701919E4323D0896DE7FDBDE0B742" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MoneyMarketFundsMember" xlink:label="loc_us-gaap_MoneyMarketFundsMember_BACE27DF694CFAAEDECAE7FDBDE073AE" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_8B9701919E4323D0896DE7FDBDE0B742" xlink:to="loc_us-gaap_MoneyMarketFundsMember_BACE27DF694CFAAEDECAE7FDBDE073AE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_E84E37121F7B73A7FE59E7FDBDE1AC96" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6DC17570152F3391F923E7FDBDE0A981" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_E84E37121F7B73A7FE59E7FDBDE1AC96" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_F23B0E05EB85559A18E3E7FDBDE14BC4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_E84E37121F7B73A7FE59E7FDBDE1AC96" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_F23B0E05EB85559A18E3E7FDBDE14BC4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="loc_us-gaap_CashAndCashEquivalentsMember_CAA48E028671D85DBAD1E7FDBDE16899" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_F23B0E05EB85559A18E3E7FDBDE14BC4" xlink:to="loc_us-gaap_CashAndCashEquivalentsMember_CAA48E028671D85DBAD1E7FDBDE16899" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_CurrentAssetsMember" xlink:label="loc_qlys_CurrentAssetsMember_F425045C8CD4E80E3C9AE7FDBDE1478F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_F23B0E05EB85559A18E3E7FDBDE14BC4" xlink:to="loc_qlys_CurrentAssetsMember_F425045C8CD4E80E3C9AE7FDBDE1478F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByMeasurementBasisAxis" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_F32C11081CB4B308A4A2E7FDBDE2DCCA" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6DC17570152F3391F923E7FDBDE0A981" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_F32C11081CB4B308A4A2E7FDBDE2DCCA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosureItemAmountsDomain" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_5DA47B6A62D676AE7274E7FDBDE2C941" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_F32C11081CB4B308A4A2E7FDBDE2DCCA" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_5DA47B6A62D676AE7274E7FDBDE2C941" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_106244B3367D750B957DE7FDBDE24C29" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_5DA47B6A62D676AE7274E7FDBDE2C941" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_106244B3367D750B957DE7FDBDE24C29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_162137E274AD427122FEE7FDBDE2A403" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_5DA47B6A62D676AE7274E7FDBDE2C941" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_162137E274AD427122FEE7FDBDE2A403" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis_93623A2415B314A36FC3E7FDBDE28259" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6DC17570152F3391F923E7FDBDE0A981" xlink:to="loc_us-gaap_FinancialInstrumentAxis_93623A2415B314A36FC3E7FDBDE28259" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2374465033DED98C962EE7FDBDE38619" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentAxis_93623A2415B314A36FC3E7FDBDE28259" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2374465033DED98C962EE7FDBDE38619" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialPaperMember" xlink:label="loc_us-gaap_CommercialPaperMember_C20D482751534C111752E7FDBDE36B0D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2374465033DED98C962EE7FDBDE38619" xlink:to="loc_us-gaap_CommercialPaperMember_C20D482751534C111752E7FDBDE36B0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_USTreasuryBillSecuritiesMember" xlink:label="loc_us-gaap_USTreasuryBillSecuritiesMember_0271374B91ADBBDE9753E8A727613A33" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2374465033DED98C962EE7FDBDE38619" xlink:to="loc_us-gaap_USTreasuryBillSecuritiesMember_0271374B91ADBBDE9753E8A727613A33" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_138300046450717F96A8E7FDBDE391FA" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2374465033DED98C962EE7FDBDE38619" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_138300046450717F96A8E7FDBDE391FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CorporateBondSecuritiesMember" xlink:label="loc_us-gaap_CorporateBondSecuritiesMember_17D0192252B7E94AD2E8E7FDBDE3CF58" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2374465033DED98C962EE7FDBDE38619" xlink:to="loc_us-gaap_CorporateBondSecuritiesMember_17D0192252B7E94AD2E8E7FDBDE3CF58" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CertificatesOfDepositMember" xlink:label="loc_us-gaap_CertificatesOfDepositMember_94DD7ADDE1F1B0F74CDEE8A7277D6559" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2374465033DED98C962EE7FDBDE38619" xlink:to="loc_us-gaap_CertificatesOfDepositMember_94DD7ADDE1F1B0F74CDEE8A7277D6559" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetBackedSecuritiesMember" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_5BA949FD0AB44C136676E7FDBDE3DA2F" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2374465033DED98C962EE7FDBDE38619" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_5BA949FD0AB44C136676E7FDBDE3DA2F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MunicipalBondsMember" xlink:label="loc_us-gaap_MunicipalBondsMember_69D589902863FBD5CB7BE8A727AF75A7" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_2374465033DED98C962EE7FDBDE38619" xlink:to="loc_us-gaap_MunicipalBondsMember_69D589902863FBD5CB7BE8A727AF75A7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0075B25E6F2E639AF5F7E7FDBDE43913" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6DC17570152F3391F923E7FDBDE0A981" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0075B25E6F2E639AF5F7E7FDBDE43913" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_23A0B2921B86166EBDD2E7FDBDE4DF93" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0075B25E6F2E639AF5F7E7FDBDE43913" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_23A0B2921B86166EBDD2E7FDBDE4DF93" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_4B66B8EBCB9A9451B38AE7FDBDE42351" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_23A0B2921B86166EBDD2E7FDBDE4DF93" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_4B66B8EBCB9A9451B38AE7FDBDE42351" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_E58AB8D8FD4713681A16E7FDBDE46DE3" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_23A0B2921B86166EBDD2E7FDBDE4DF93" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_E58AB8D8FD4713681A16E7FDBDE46DE3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_6DB1ACED648D81C96491E7FDBDE44FF9" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_23A0B2921B86166EBDD2E7FDBDE4DF93" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_6DB1ACED648D81C96491E7FDBDE44FF9" xlink:type="arc" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_23A0B2921B86166EBDD2E7FDBDE4DF93" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_162137E274AD427122FEE7FDBDE2A403" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueByMeasurementFrequencyAxis" xlink:label="loc_us-gaap_FairValueByMeasurementFrequencyAxis_0240AA658A7FEE4EB6E3E7FDBDE5F258" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6DC17570152F3391F923E7FDBDE0A981" xlink:to="loc_us-gaap_FairValueByMeasurementFrequencyAxis_0240AA658A7FEE4EB6E3E7FDBDE5F258" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementFrequencyDomain" xlink:label="loc_us-gaap_FairValueMeasurementFrequencyDomain_196DDA4979C78B9F60F6E7FDBDE59B0B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueByMeasurementFrequencyAxis_0240AA658A7FEE4EB6E3E7FDBDE5F258" xlink:to="loc_us-gaap_FairValueMeasurementFrequencyDomain_196DDA4979C78B9F60F6E7FDBDE59B0B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementsRecurringMember" xlink:label="loc_us-gaap_FairValueMeasurementsRecurringMember_EC388E8A085965F88FDAE7FDBDE5F9DC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueMeasurementFrequencyDomain_196DDA4979C78B9F60F6E7FDBDE59B0B" xlink:to="loc_us-gaap_FairValueMeasurementsRecurringMember_EC388E8A085965F88FDAE7FDBDE5F9DC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_6DC17570152F3391F923E7FDBDE0A981" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MoneyMarketFundsAtCarryingValue" xlink:label="loc_us-gaap_MoneyMarketFundsAtCarryingValue_AE263E0AAFD459A7BC00E8A0B98DDBFC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_MoneyMarketFundsAtCarryingValue_AE263E0AAFD459A7BC00E8A0B98DDBFC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_0214274ECF93ABE4EC95E7FDBDE5937F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_0214274ECF93ABE4EC95E7FDBDE5937F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_55D036B55444BBF83B9AE7FDBDE6C802" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_55D036B55444BBF83B9AE7FDBDE6C802" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesNextTwelveMonthsFairValue" xlink:label="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesNextTwelveMonthsFairValue_9ADB803507046CDDBA66E7FDBDE6DF55" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesNextTwelveMonthsFairValue_9ADB803507046CDDBA66E7FDBDE6DF55" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesYearOneThroughTwoFairValue" xlink:label="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesYearOneThroughTwoFairValue_13C90D0466298E974680E7FDBDE639C5" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesYearOneThroughTwoFairValue_13C90D0466298E974680E7FDBDE639C5" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesAfterYearTwoFairValue" xlink:label="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesAfterYearTwoFairValue_72C736A5EDCC9C114199E7FDBDE6FB24" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_qlys_AvailableForSaleSecuritiesDebtAndEquityMaturitiesAfterYearTwoFairValue_72C736A5EDCC9C114199E7FDBDE6FB24" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_FA45A962012F43F12020E7FDBDE74996" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_FA45A962012F43F12020E7FDBDE74996" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecurities_97A5874F80D6CB11B14FE7FDBDE7F493" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_AvailableForSaleSecurities_97A5874F80D6CB11B14FE7FDBDE7F493" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommercialPaperAtCarryingValue" xlink:label="loc_us-gaap_CommercialPaperAtCarryingValue_8AD2FDDEECEA4E7D99B1E8A5A93A85C0" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_CommercialPaperAtCarryingValue_8AD2FDDEECEA4E7D99B1E8A5A93A85C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_7408A83B0DAA36E7AD86E7FDBDE7211A" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_7408A83B0DAA36E7AD86E7FDBDE7211A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_USGovernmentAgenciesSecuritiesAtCarryingValue" xlink:label="loc_us-gaap_USGovernmentAgenciesSecuritiesAtCarryingValue_AEE0988242428686FD12E8A3B7C3FD7B" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_USGovernmentAgenciesSecuritiesAtCarryingValue_AEE0988242428686FD12E8A3B7C3FD7B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetBackedSecuritiesAtCarryingValue" xlink:label="loc_us-gaap_AssetBackedSecuritiesAtCarryingValue_DFF684C145F8E2A0D2F1E8A24E231899" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_AssetBackedSecuritiesAtCarryingValue_DFF684C145F8E2A0D2F1E8A24E231899" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue" xlink:label="loc_us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue_87EBDE744859BED8C993E7FDBDE719BF" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_FinancialInstrumentsOwnedCorporateDebtAtFairValue_87EBDE744859BED8C993E7FDBDE719BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure" xlink:label="loc_us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure_50BED6C2837ABC7C5A2BE7FDBDE70EEA" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_MortgageBackedSecuritiesAvailableForSaleFairValueDisclosure_50BED6C2837ABC7C5A2BE7FDBDE70EEA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentsOwnedAtFairValue" xlink:label="loc_us-gaap_FinancialInstrumentsOwnedAtFairValue_FFBFE2402F7DB3CC4AABE7FDBDE8D4DA" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_FF262DD9C88311FC9BCEE7FDBDE5BB75" xlink:to="loc_us-gaap_FinancialInstrumentsOwnedAtFairValue_FFBFE2402F7DB3CC4AABE7FDBDE8D4DA" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/FairValueOfFinancialInstrumentsFairValueOfNonMarketableSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract" xlink:label="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_C6ABA316DD4199F7747CEA6E897AA767" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherInvestmentNotReadilyMarketableTable" xlink:label="loc_us-gaap_OtherInvestmentNotReadilyMarketableTable_5D5CBCFECD2BB41CB6F1EA6E897AC9A5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract_C6ABA316DD4199F7747CEA6E897AA767" xlink:to="loc_us-gaap_OtherInvestmentNotReadilyMarketableTable_5D5CBCFECD2BB41CB6F1EA6E897AC9A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="loc_us-gaap_FinancialInstrumentAxis_8A5D7AC362E7FBFB8182EA6E897A94BF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherInvestmentNotReadilyMarketableTable_5D5CBCFECD2BB41CB6F1EA6E897AC9A5" xlink:to="loc_us-gaap_FinancialInstrumentAxis_8A5D7AC362E7FBFB8182EA6E897A94BF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_745C1A570FEC7B915461EA6E897A994E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FinancialInstrumentAxis_8A5D7AC362E7FBFB8182EA6E897A94BF" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_745C1A570FEC7B915461EA6E897A994E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_65D2E89F849841E6004EEA6E897B7510" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_745C1A570FEC7B915461EA6E897A994E" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_65D2E89F849841E6004EEA6E897B7510" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_F961DA1702411D2EA703EA6E897BBB55" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherInvestmentNotReadilyMarketableTable_5D5CBCFECD2BB41CB6F1EA6E897AC9A5" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_F961DA1702411D2EA703EA6E897BBB55" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_5B315F44FAC74C1863A6EA6E897BB2F0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_F961DA1702411D2EA703EA6E897BBB55" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_5B315F44FAC74C1863A6EA6E897BB2F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsMember" xlink:label="loc_us-gaap_CashAndCashEquivalentsMember_654561AAD49722A502D3EA6E897B64CF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_5B315F44FAC74C1863A6EA6E897BB2F0" xlink:to="loc_us-gaap_CashAndCashEquivalentsMember_654561AAD49722A502D3EA6E897B64CF" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_CurrentAssetsMember" xlink:label="loc_qlys_CurrentAssetsMember_BBE792434323486995E2EA6E897C930E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_5B315F44FAC74C1863A6EA6E897BB2F0" xlink:to="loc_qlys_CurrentAssetsMember_BBE792434323486995E2EA6E897C930E" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_NoncurrentAssetsMember" xlink:label="loc_qlys_NoncurrentAssetsMember_1E64DD98E064481C262AEA6E897CFBD4" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_5B315F44FAC74C1863A6EA6E897BB2F0" xlink:to="loc_qlys_NoncurrentAssetsMember_1E64DD98E064481C262AEA6E897CFBD4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentTypeAxis" xlink:label="loc_us-gaap_InvestmentTypeAxis_0145749DE97F4D8A5CABEA6E897C48B6" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherInvestmentNotReadilyMarketableTable_5D5CBCFECD2BB41CB6F1EA6E897AC9A5" xlink:to="loc_us-gaap_InvestmentTypeAxis_0145749DE97F4D8A5CABEA6E897C48B6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_E8738F5DA7B5B42A1FC4EA6E897C12BC" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentTypeAxis_0145749DE97F4D8A5CABEA6E897C48B6" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_E8738F5DA7B5B42A1FC4EA6E897C12BC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PreferredStockMember" xlink:label="loc_us-gaap_PreferredStockMember_16FF5CF58CDE5742E737EA6E897CED72" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_E8738F5DA7B5B42A1FC4EA6E897C12BC" xlink:to="loc_us-gaap_PreferredStockMember_16FF5CF58CDE5742E737EA6E897CED72" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConvertibleDebtSecuritiesMember" xlink:label="loc_us-gaap_ConvertibleDebtSecuritiesMember_18327511002B9B09B218EA6E897DDE98" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_E8738F5DA7B5B42A1FC4EA6E897C12BC" xlink:to="loc_us-gaap_ConvertibleDebtSecuritiesMember_18327511002B9B09B218EA6E897DDE98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherInvestmentNotReadilyMarketableLineItems" xlink:label="loc_us-gaap_OtherInvestmentNotReadilyMarketableLineItems_BB4308C36234834C3150EA6E897DAB2C" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherInvestmentNotReadilyMarketableTable_5D5CBCFECD2BB41CB6F1EA6E897AC9A5" xlink:to="loc_us-gaap_OtherInvestmentNotReadilyMarketableLineItems_BB4308C36234834C3150EA6E897DAB2C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_5A2F083062F1B665955EEA6E897DFAE5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherInvestmentNotReadilyMarketableLineItems_BB4308C36234834C3150EA6E897DAB2C" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_5A2F083062F1B665955EEA6E897DFAE5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_DBF66B710395C406C2D8EA6E897D12DF" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherInvestmentNotReadilyMarketableLineItems_BB4308C36234834C3150EA6E897DAB2C" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_DBF66B710395C406C2D8EA6E897D12DF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesCurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesCurrent_9BDBA986A0F042BB3070EA6E897D4537" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherInvestmentNotReadilyMarketableLineItems_BB4308C36234834C3150EA6E897DAB2C" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesCurrent_9BDBA986A0F042BB3070EA6E897D4537" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Investments" xlink:label="loc_us-gaap_Investments_6694396866962DBD3250EA6E897D5438" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherInvestmentNotReadilyMarketableLineItems_BB4308C36234834C3150EA6E897DAB2C" xlink:to="loc_us-gaap_Investments_6694396866962DBD3250EA6E897D5438" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentIncomeInvestmentExpense" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense_4482938E2A3B84E98377EA6E897E746B" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherInvestmentNotReadilyMarketableLineItems_BB4308C36234834C3150EA6E897DAB2C" xlink:to="loc_us-gaap_InvestmentIncomeInvestmentExpense_4482938E2A3B84E98377EA6E897E746B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireInvestments" xlink:label="loc_us-gaap_PaymentsToAcquireInvestments_EE7D50EDC7F6FEFD127FEA6E897E99C0" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_OtherInvestmentNotReadilyMarketableLineItems_BB4308C36234834C3150EA6E897DAB2C" xlink:to="loc_us-gaap_PaymentsToAcquireInvestments_EE7D50EDC7F6FEFD127FEA6E897E99C0" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/FairValueOfFinancialInstrumentsGainsLossesRecognizedDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_C20357EB39034BE5E436E19F7E91002E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5654D26CDFF6773CD64AE19F7E9205F1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_C20357EB39034BE5E436E19F7E91002E" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5654D26CDFF6773CD64AE19F7E9205F1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NatureOfExpenseAxis" xlink:label="loc_us-gaap_NatureOfExpenseAxis_1F4C86160712D0958A8BE19F7E928353" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5654D26CDFF6773CD64AE19F7E9205F1" xlink:to="loc_us-gaap_NatureOfExpenseAxis_1F4C86160712D0958A8BE19F7E928353" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_FA0FEE3608F92E24F8ECE19F7E971015" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_NatureOfExpenseAxis_1F4C86160712D0958A8BE19F7E928353" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_FA0FEE3608F92E24F8ECE19F7E971015" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_7AD5E44C7DB259E3BEA2E19F7E9873B7" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5654D26CDFF6773CD64AE19F7E9205F1" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_7AD5E44C7DB259E3BEA2E19F7E9873B7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_38021C7683BFFCF03B81E19F7E984E07" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_7AD5E44C7DB259E3BEA2E19F7E9873B7" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_38021C7683BFFCF03B81E19F7E984E07" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForwardContractsMember" xlink:label="loc_us-gaap_ForwardContractsMember_B6B2DC8EAC8B2FC32263E19F7E98C2ED" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_38021C7683BFFCF03B81E19F7E984E07" xlink:to="loc_us-gaap_ForwardContractsMember_B6B2DC8EAC8B2FC32263E19F7E98C2ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationAxis" xlink:label="loc_us-gaap_HedgingDesignationAxis_C8139BA73442F3419076E19F7E98CCDC" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5654D26CDFF6773CD64AE19F7E9205F1" xlink:to="loc_us-gaap_HedgingDesignationAxis_C8139BA73442F3419076E19F7E98CCDC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_HedgingDesignationDomain" xlink:label="loc_us-gaap_HedgingDesignationDomain_CAEDD0325D927BAE7CE3E19F7E98398B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationAxis_C8139BA73442F3419076E19F7E98CCDC" xlink:to="loc_us-gaap_HedgingDesignationDomain_CAEDD0325D927BAE7CE3E19F7E98398B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NondesignatedMember" xlink:label="loc_us-gaap_NondesignatedMember_EFB7DCC53AE72AC0D189E19F7E99DC3E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_HedgingDesignationDomain_CAEDD0325D927BAE7CE3E19F7E98398B" xlink:to="loc_us-gaap_NondesignatedMember_EFB7DCC53AE72AC0D189E19F7E99DC3E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossLineItems" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_1444C48707AB2920A87EE19F7E992361" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipByIncomeStatementLocationByDerivativeInstrumentRiskTable_5654D26CDFF6773CD64AE19F7E9205F1" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_1444C48707AB2920A87EE19F7E992361" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet" xlink:label="loc_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet_E7120C9E03A031B67F73E19F7E99D1C3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_1444C48707AB2920A87EE19F7E992361" xlink:to="loc_us-gaap_DerivativeInstrumentsGainLossRecognizedInIncomeIneffectivePortionAndAmountExcludedFromEffectivenessTestingNet_E7120C9E03A031B67F73E19F7E99D1C3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ForeignCurrencyTransactionGainLossBeforeTax" xlink:label="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_7040B6DD2EC404A9A260E19F7E9AB6FA" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_1444C48707AB2920A87EE19F7E992361" xlink:to="loc_us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_7040B6DD2EC404A9A260E19F7E9AB6FA" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ForeignCurrencyTransactionGainLossIncludingDerivativesBeforeTax" xlink:label="loc_qlys_ForeignCurrencyTransactionGainLossIncludingDerivativesBeforeTax_BD0EB978FAB7542839A6E19F7E9A12FA" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_1444C48707AB2920A87EE19F7E992361" xlink:to="loc_qlys_ForeignCurrencyTransactionGainLossIncludingDerivativesBeforeTax_BD0EB978FAB7542839A6E19F7E9A12FA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNonoperatingExpense" xlink:label="loc_us-gaap_OtherNonoperatingExpense_B01C9D0082F669A16CFEE19F7E9A05BB" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_1444C48707AB2920A87EE19F7E992361" xlink:to="loc_us-gaap_OtherNonoperatingExpense_B01C9D0082F669A16CFEE19F7E9A05BB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_A95376A97EF0BA39061DE19F7E9AF27A" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DerivativeInstrumentsGainLossLineItems_1444C48707AB2920A87EE19F7E992361" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_A95376A97EF0BA39061DE19F7E9AF27A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/FairValueOfFinancialInstrumentsTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="loc_us-gaap_FairValueDisclosuresAbstract_F433A95AA94F99FA2E79E14A45CD21F7" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsTextBlock" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsTextBlock_924EF5326F7AC66932EBE16D1FECFE76" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_F433A95AA94F99FA2E79E14A45CD21F7" xlink:to="loc_us-gaap_ScheduleOfDerivativeInstrumentsTextBlock_924EF5326F7AC66932EBE16D1FECFE76" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_6086511724B2FC783416E14A45CDF08E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_F433A95AA94F99FA2E79E14A45CD21F7" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_6086511724B2FC783416E14A45CDF08E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_0C5271DA3000026505FCE14A45CD3180" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_F433A95AA94F99FA2E79E14A45CD21F7" xlink:to="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_0C5271DA3000026505FCE14A45CD3180" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_F7A345D3B681C6040497E14A45CD460A" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_F433A95AA94F99FA2E79E14A45CD21F7" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisTextBlock_F7A345D3B681C6040497E14A45CD460A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock" xlink:label="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_8BAE60A97462699CD6B3E14A45CD1B61" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_F433A95AA94F99FA2E79E14A45CD21F7" xlink:to="loc_us-gaap_InvestmentsClassifiedByContractualMaturityDateTableTextBlock_8BAE60A97462699CD6B3E14A45CD1B61" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:label="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_0AC9C21FBF42B3754DD7E14A45CEDA76" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FairValueDisclosuresAbstract_F433A95AA94F99FA2E79E14A45CD21F7" xlink:to="loc_us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_0AC9C21FBF42B3754DD7E14A45CEDA76" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/GoodwillAndIntangibleAssetsNet" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_6FB004A9FAC6DB4BCD5AD6C35ECCA90B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_11A6223FBBB839DB1DD4D6C35ECC64B3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_6FB004A9FAC6DB4BCD5AD6C35ECCA90B" xlink:to="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureTextBlock_11A6223FBBB839DB1DD4D6C35ECC64B3" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/GoodwillAndIntangibleAssetsNetCarryingValueOfIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_67614D29514CFCEBEA19D991012194B2" xlink:type="locator" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ScheduleOfGoodwillAndIntangibleAssetsTable" xlink:label="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsTable_8F7A83FCC79C1653C481D9910121ACAE" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_67614D29514CFCEBEA19D991012194B2" xlink:to="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsTable_8F7A83FCC79C1653C481D9910121ACAE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_190BD38478F5F48366CBD9910121AA9C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsTable_8F7A83FCC79C1653C481D9910121ACAE" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_190BD38478F5F48366CBD9910121AA9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_EFCFC34BA6D237C720A8D9910121D2AA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_190BD38478F5F48366CBD9910121AA9C" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_EFCFC34BA6D237C720A8D9910121D2AA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_6E0B6913932897BC7559D99101214765" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_EFCFC34BA6D237C720A8D9910121D2AA" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_6E0B6913932897BC7559D99101214765" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PatentsMember" xlink:label="loc_us-gaap_PatentsMember_95A13F79FF44E5E41F2ED9910121FC43" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_EFCFC34BA6D237C720A8D9910121D2AA" xlink:to="loc_us-gaap_PatentsMember_95A13F79FF44E5E41F2ED9910121FC43" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_231E7D8EF2B2674A4942D992154DE137" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsTable_8F7A83FCC79C1653C481D9910121ACAE" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_231E7D8EF2B2674A4942D992154DE137" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_C6A91C05047466E4E74BD99216005A7C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_231E7D8EF2B2674A4942D992154DE137" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_C6A91C05047466E4E74BD99216005A7C" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_IntangibleassetsnotsubjecttoamortizationMember" xlink:label="loc_qlys_IntangibleassetsnotsubjecttoamortizationMember_C8846543F1C784FBED6CD993147267E9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_C6A91C05047466E4E74BD99216005A7C" xlink:to="loc_qlys_IntangibleassetsnotsubjecttoamortizationMember_C8846543F1C784FBED6CD993147267E9" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems" xlink:label="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsTable_8F7A83FCC79C1653C481D9910121ACAE" xlink:to="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_04F40FC027E39F557DC0D9910121C2AB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_04F40FC027E39F557DC0D9910121C2AB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_358BD35E01E9B1271ADDD99101216784" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1_358BD35E01E9B1271ADDD99101216784" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsGross" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_A214A82F04F0FDE3EDFAD991012196CB" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_A214A82F04F0FDE3EDFAD991012196CB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_88700D1414AB2110B0E7D9910121C326" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_88700D1414AB2110B0E7D9910121C326" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_857810AF957FC3D71924D9910121992F" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_857810AF957FC3D71924D9910121992F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_93833F36BF4201CBE4E9D991012143A3" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill_93833F36BF4201CBE4E9D991012143A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_B4405C8780EA85291AB6D99101219DAF" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_B4405C8780EA85291AB6D99101219DAF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_C18D3355F3593B3AF905D9910121CDFA" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_C18D3355F3593B3AF905D9910121CDFA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_1F4D462D123A3E4340F8D991012183AC" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScheduleOfGoodwillAndIntangibleAssetsLineItems_4D130AE758DC15C1316ED99101213DC6" xlink:to="loc_us-gaap_Goodwill_1F4D462D123A3E4340F8D991012183AC" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/GoodwillAndIntangibleAssetsNetFutureAmortizationDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_62AB85F5639492E0EF31D72F9BEB311F" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_8452BB2E78164D59926FD72F9BEB9D91" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_62AB85F5639492E0EF31D72F9BEB311F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear_8452BB2E78164D59926FD72F9BEB9D91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_1E3AA2A7D8640EC048BED72F9BEB2FAD" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_62AB85F5639492E0EF31D72F9BEB311F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_1E3AA2A7D8640EC048BED72F9BEB2FAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_858576943CDFAB8DDC8DD72F9BEBC392" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_62AB85F5639492E0EF31D72F9BEB311F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_858576943CDFAB8DDC8DD72F9BEBC392" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_6185B25388DEB777BB90D72F9BEB0027" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_62AB85F5639492E0EF31D72F9BEB311F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_6185B25388DEB777BB90D72F9BEB0027" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_0DBEB9F600FC7449E04BD72F9BEBBD25" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_62AB85F5639492E0EF31D72F9BEB311F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_0DBEB9F600FC7449E04BD72F9BEBBD25" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_3F581F66FDC68B5059DED72F9BEBCCF3" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_62AB85F5639492E0EF31D72F9BEB311F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_3F581F66FDC68B5059DED72F9BEBCCF3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_BD984F125B41B9104135D72F9BEB755A" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_62AB85F5639492E0EF31D72F9BEB311F" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_BD984F125B41B9104135D72F9BEB755A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/GoodwillAndIntangibleAssetsNetTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract" xlink:label="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_FA6247E2D7D404723BECD6C35E859E59" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock" xlink:label="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock_914F9858ED664E7AEDACD6C35E85BF73" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_FA6247E2D7D404723BECD6C35E859E59" xlink:to="loc_us-gaap_ScheduleOfAcquiredFiniteLivedIntangibleAssetsByMajorClassTextBlock_914F9858ED664E7AEDACD6C35E85BF73" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock" xlink:label="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_D71DFBAB97DBD3FA66DFD6C35E86D7AD" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_GoodwillAndIntangibleAssetsDisclosureAbstract_FA6247E2D7D404723BECD6C35E859E59" xlink:to="loc_us-gaap_ScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseTableTextBlock_D71DFBAB97DBD3FA66DFD6C35E86D7AD" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/IncomeTaxes" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_B561CF76B39B76D77466D6C35E877143" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="loc_us-gaap_IncomeTaxDisclosureTextBlock_BDB5B8C94F2BB030DBB8D6C35E87CE0F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_B561CF76B39B76D77466D6C35E877143" xlink:to="loc_us-gaap_IncomeTaxDisclosureTextBlock_BDB5B8C94F2BB030DBB8D6C35E87CE0F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/IncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="loc_us-gaap_IncomeTaxDisclosureAbstract_6D8F85C7AD1F079C21DAD6C35F8D7A7B" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_91A2BA85AE4EF2187A39D6C35F8D1CEB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_6D8F85C7AD1F079C21DAD6C35F8D7A7B" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_91A2BA85AE4EF2187A39D6C35F8D1CEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_086D3902A55C3EC5E9F3D6C35F8E488F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_6D8F85C7AD1F079C21DAD6C35F8D7A7B" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_086D3902A55C3EC5E9F3D6C35F8E488F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="loc_us-gaap_UnrecognizedTaxBenefits_82583C9040ADD8EE2312D6C35F8EAFB8" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_6D8F85C7AD1F079C21DAD6C35F8D7A7B" xlink:to="loc_us-gaap_UnrecognizedTaxBenefits_82583C9040ADD8EE2312D6C35F8EAFB8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_945FFC54D108246A9DB0D6C35F8ED932" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeTaxDisclosureAbstract_6D8F85C7AD1F079C21DAD6C35F8D7A7B" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_945FFC54D108246A9DB0D6C35F8ED932" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/LeasesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesAbstract" xlink:label="loc_us-gaap_LeasesAbstract_6B716C46D2FFE85A52FBDBE8C4036697" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionTable" xlink:label="loc_us-gaap_LesseeLeaseDescriptionTable_CB122F2BAF123A1C56CADBE8C4033BE9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_6B716C46D2FFE85A52FBDBE8C4036697" xlink:to="loc_us-gaap_LesseeLeaseDescriptionTable_CB122F2BAF123A1C56CADBE8C4033BE9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_AB2DBCB062F9801EEB9FDBE8C413D2F9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_CB122F2BAF123A1C56CADBE8C4033BE9" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_AB2DBCB062F9801EEB9FDBE8C413D2F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_D536B4872CAA59F51C5EDBE8C4133E0F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_AB2DBCB062F9801EEB9FDBE8C413D2F9" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_D536B4872CAA59F51C5EDBE8C4133E0F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherNoncurrentLiabilitiesMember" xlink:label="loc_us-gaap_OtherNoncurrentLiabilitiesMember_B82EBCC0C10EDBADFB67DBE8C4131929" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_D536B4872CAA59F51C5EDBE8C4133E0F" xlink:to="loc_us-gaap_OtherNoncurrentLiabilitiesMember_B82EBCC0C10EDBADFB67DBE8C4131929" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeLeaseDescriptionLineItems" xlink:label="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionTable_CB122F2BAF123A1C56CADBE8C4033BE9" xlink:to="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeasePayments" xlink:label="loc_us-gaap_OperatingLeasePayments_D609827C7C7C2319E27CDBEBBA82BC15" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_OperatingLeasePayments_D609827C7C7C2319E27CDBEBBA82BC15" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_CapitalLeasedAssetsInterestRate" xlink:label="loc_qlys_CapitalLeasedAssetsInterestRate_D426D15501DE0D39B4BFDBE8C413434B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_qlys_CapitalLeasedAssetsInterestRate_D426D15501DE0D39B4BFDBE8C413434B" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_LeaseExpense" xlink:label="loc_qlys_LeaseExpense_C82B0E4B17083DA2F034DBE8C413D691" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_qlys_LeaseExpense_C82B0E4B17083DA2F034DBE8C413D691" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_D6DE3CD08FEBF7A6711EDBE8C4132A08" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_D6DE3CD08FEBF7A6711EDBE8C4132A08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_F07B86A5CFD8441169F6DBE8C4130FB9" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_F07B86A5CFD8441169F6DBE8C4130FB9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_6191A353CFCE8C629E2DDBE8C4138D9E" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_6191A353CFCE8C629E2DDBE8C4138D9E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_96C4FB4C892E22F633CADBE8C4136CEB" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageRemainingLeaseTerm1_96C4FB4C892E22F633CADBE8C4136CEB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_9144A0FF8C2196C24563DBE8C413F29A" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_9144A0FF8C2196C24563DBE8C413F29A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent" xlink:label="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_914523008101E5293E5FDBE8C413C375" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseWeightedAverageDiscountRatePercent_914523008101E5293E5FDBE8C413C375" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAsset" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_9706E7E29240FDCFE927DBE8C4139933" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_9706E7E29240FDCFE927DBE8C4139933" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_LeaseRightofUseAsset" xlink:label="loc_qlys_LeaseRightofUseAsset_B2E5367344292A943D6EDBE8C413BF8E" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_qlys_LeaseRightofUseAsset_B2E5367344292A943D6EDBE8C413BF8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_B0008B0719553B851A8CDBE8C41341F9" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_B0008B0719553B851A8CDBE8C41341F9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityCurrent" xlink:label="loc_us-gaap_FinanceLeaseLiabilityCurrent_6A085EC3BBD04DD4BB56DBE8C413501E" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityCurrent_6A085EC3BBD04DD4BB56DBE8C413501E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_92C39513988E0F973927DBE8C413A4E7" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_92C39513988E0F973927DBE8C413A4E7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_F9F6823C9FD0D2B9CC5CDBE8C4131655" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityNoncurrent_F9F6823C9FD0D2B9CC5CDBE8C4131655" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_LeaseLiability" xlink:label="loc_qlys_LeaseLiability_8234CE5AC88417EF82C7DBE8C4137BF9" xlink:type="locator" />
    <link:presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_qlys_LeaseLiability_8234CE5AC88417EF82C7DBE8C4137BF9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear_2BD924E70C1CA34D32A7DBE8C413E510" xlink:type="locator" />
    <link:presentationArc order="17" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear_2BD924E70C1CA34D32A7DBE8C413E510" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_DD5ABBA5C347135C791CDBE8C413222B" xlink:type="locator" />
    <link:presentationArc order="18" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_DD5ABBA5C347135C791CDBE8C413222B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_6D36017CB03D9158D92DDBE8C413A3F3" xlink:type="locator" />
    <link:presentationArc order="19" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearTwo_6D36017CB03D9158D92DDBE8C413A3F3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_9AC9D45E84EB79237115DBE8C413BBF4" xlink:type="locator" />
    <link:presentationArc order="20" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_9AC9D45E84EB79237115DBE8C413BBF4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_6D11D8ACA3AC7DE3B4EEDBE8C413147C" xlink:type="locator" />
    <link:presentationArc order="21" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearThree_6D11D8ACA3AC7DE3B4EEDBE8C413147C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_C8BC435CE0AF9D21DA6DDBE8C413AB42" xlink:type="locator" />
    <link:presentationArc order="22" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_C8BC435CE0AF9D21DA6DDBE8C413AB42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_9BF82F729CF4BF8FDBDCDBE8C413CEC0" xlink:type="locator" />
    <link:presentationArc order="23" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFour_9BF82F729CF4BF8FDBDCDBE8C413CEC0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_D43A1797026F376EBF62DBE8C413FDF1" xlink:type="locator" />
    <link:presentationArc order="24" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_D43A1797026F376EBF62DBE8C413FDF1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_C95F2B89B59391842292DBE8C413B1CC" xlink:type="locator" />
    <link:presentationArc order="25" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueYearFive_C95F2B89B59391842292DBE8C413B1CC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0BE9B0211C9EA9D26B43DBE8C41372AF" xlink:type="locator" />
    <link:presentationArc order="26" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_0BE9B0211C9EA9D26B43DBE8C41372AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_8281A11C5A65BF4AA7DDDBE8C413222F" xlink:type="locator" />
    <link:presentationArc order="27" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDueAfterYearFive_8281A11C5A65BF4AA7DDDBE8C413222F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_8D8E26A0F002BA333E37DBE8C413CB94" xlink:type="locator" />
    <link:presentationArc order="28" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_8D8E26A0F002BA333E37DBE8C413CB94" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityPaymentsDue" xlink:label="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_B36F984BD0C209617E4CDBE8C41FFF8E" xlink:type="locator" />
    <link:presentationArc order="29" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityPaymentsDue_B36F984BD0C209617E4CDBE8C41FFF8E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_D80DE62DFCDB2A476547DBE8C41F8CBE" xlink:type="locator" />
    <link:presentationArc order="30" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_D80DE62DFCDB2A476547DBE8C41F8CBE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount" xlink:label="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_41FF9B92A3466686EF9EDBE8C41FBC30" xlink:type="locator" />
    <link:presentationArc order="31" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiabilityUndiscountedExcessAmount_41FF9B92A3466686EF9EDBE8C41FBC30" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_0BCAA3479B96870674C4DBE8C41FE695" xlink:type="locator" />
    <link:presentationArc order="32" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_OperatingLeaseLiability_0BCAA3479B96870674C4DBE8C41FE695" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiability" xlink:label="loc_us-gaap_FinanceLeaseLiability_527FCE4626AEF849E06BDBE8C41FEBF6" xlink:type="locator" />
    <link:presentationArc order="33" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_FinanceLeaseLiability_527FCE4626AEF849E06BDBE8C41FEBF6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability" xlink:label="loc_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_984A6B339E57CBF09EAFDBF03FD11990" xlink:type="locator" />
    <link:presentationArc order="34" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LesseeLeaseDescriptionLineItems_7ACAC145476D6882B1F9DBE8C4133DC5" xlink:to="loc_us-gaap_RightOfUseAssetObtainedInExchangeForFinanceLeaseLiability_984A6B339E57CBF09EAFDBF03FD11990" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/LeasesNotes" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesAbstract" xlink:label="loc_us-gaap_LeasesAbstract_CFBC922DED716048B0AED6C35EA1A4E2" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeasesTextBlock" xlink:label="loc_us-gaap_LesseeOperatingLeasesTextBlock_62E4DF4BC4172F96D558D6C35EA2DC7F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_CFBC922DED716048B0AED6C35EA1A4E2" xlink:to="loc_us-gaap_LesseeOperatingLeasesTextBlock_62E4DF4BC4172F96D558D6C35EA2DC7F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeFinanceLeasesTextBlock" xlink:label="loc_us-gaap_LesseeFinanceLeasesTextBlock_7B5934679FBC3C7C3D06D6C35EA297F6" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_CFBC922DED716048B0AED6C35EA1A4E2" xlink:to="loc_us-gaap_LesseeFinanceLeasesTextBlock_7B5934679FBC3C7C3D06D6C35EA297F6" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/LeasesTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeasesAbstract" xlink:label="loc_us-gaap_LeasesAbstract_1EF3441A5BE35D0C08BBE14A4520E76D" xlink:type="locator" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AssetsAndLiabilitiesLeaseTableTextBlock" xlink:label="loc_qlys_AssetsAndLiabilitiesLeaseTableTextBlock_75B51571E1000273476FE14A45217A49" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_1EF3441A5BE35D0C08BBE14A4520E76D" xlink:to="loc_qlys_AssetsAndLiabilitiesLeaseTableTextBlock_75B51571E1000273476FE14A45217A49" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_E29726A0599DD57C39F9E14A4521171D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_1EF3441A5BE35D0C08BBE14A4520E76D" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_E29726A0599DD57C39F9E14A4521171D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock" xlink:label="loc_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_CD50689F742172410F00E14A45215AD9" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_1EF3441A5BE35D0C08BBE14A4520E76D" xlink:to="loc_us-gaap_FinanceLeaseLiabilityMaturityTableTextBlock_CD50689F742172410F00E14A45215AD9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseCostTableTextBlock" xlink:label="loc_us-gaap_LeaseCostTableTextBlock_4C8A23EF204C1BBF38C5E14A45212D1F" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_LeasesAbstract_1EF3441A5BE35D0C08BBE14A4520E76D" xlink:to="loc_us-gaap_LeaseCostTableTextBlock_4C8A23EF204C1BBF38C5E14A45212D1F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/NetIncomePerShare" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_95B22EFC7BDD6A3C49BAD6C35ED8CE7A" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_7B363D66682B38AE105ED6C35ED8AD77" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_95B22EFC7BDD6A3C49BAD6C35ED8CE7A" xlink:to="loc_us-gaap_EarningsPerShareTextBlock_7B363D66682B38AE105ED6C35ED8AD77" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/NetIncomePerShareDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_E98BC1263FF66913CE71D6C35F877F20" xlink:type="locator" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_NumeratorAbstract" xlink:label="loc_qlys_NumeratorAbstract_9DC0EEA02A1C5E08A21BD6C35F887D04" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_E98BC1263FF66913CE71D6C35F877F20" xlink:to="loc_qlys_NumeratorAbstract_9DC0EEA02A1C5E08A21BD6C35F887D04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_DABD9B2B1ACBD96B3299D6C35F88A92B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_NumeratorAbstract_9DC0EEA02A1C5E08A21BD6C35F887D04" xlink:to="loc_us-gaap_NetIncomeLoss_DABD9B2B1ACBD96B3299D6C35F88A92B" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_DenominatorAbstract" xlink:label="loc_qlys_DenominatorAbstract_825326BAA460D097E032D6C35F883059" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_E98BC1263FF66913CE71D6C35F877F20" xlink:to="loc_qlys_DenominatorAbstract_825326BAA460D097E032D6C35F883059" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_D79AAE941321FCA47AAAD6C35F886D37" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DenominatorAbstract_825326BAA460D097E032D6C35F883059" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_D79AAE941321FCA47AAAD6C35F886D37" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_18311637F95EA4E3BD08D6C35F891E9D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DenominatorAbstract_825326BAA460D097E032D6C35F883059" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_18311637F95EA4E3BD08D6C35F891E9D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_7675E3ECE2A4BF84E1AAD6C35F897946" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DenominatorAbstract_825326BAA460D097E032D6C35F883059" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToCallOptionsAndWarrants_7675E3ECE2A4BF84E1AAD6C35F897946" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_B86F5CBECF01B0CE69F8D6C35F89B399" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_DenominatorAbstract_825326BAA460D097E032D6C35F883059" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_B86F5CBECF01B0CE69F8D6C35F89B399" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareBasic" xlink:label="loc_us-gaap_EarningsPerShareBasic_93C99F4A4D867F10F753D6C35F895642" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_E98BC1263FF66913CE71D6C35F877F20" xlink:to="loc_us-gaap_EarningsPerShareBasic_93C99F4A4D867F10F753D6C35F895642" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="loc_us-gaap_EarningsPerShareDiluted_B10844CA63228A637EE8D6C35F89E601" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_E98BC1263FF66913CE71D6C35F877F20" xlink:to="loc_us-gaap_EarningsPerShareDiluted_B10844CA63228A637EE8D6C35F89E601" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_A8A4DF16C1AF52FB5764D6C35F890C15" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_E98BC1263FF66913CE71D6C35F877F20" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_A8A4DF16C1AF52FB5764D6C35F890C15" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_F2EE3391F9F2BE44C055D6C35F890774" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_A8A4DF16C1AF52FB5764D6C35F890C15" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_F2EE3391F9F2BE44C055D6C35F890774" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesNameDomain" xlink:label="loc_us-gaap_AntidilutiveSecuritiesNameDomain_70F4DA23A8C4A6B47F14D6C35F8A8CC2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_F2EE3391F9F2BE44C055D6C35F890774" xlink:to="loc_us-gaap_AntidilutiveSecuritiesNameDomain_70F4DA23A8C4A6B47F14D6C35F8A8CC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_FC531A8A20E72DBCAB2AD6C35F8A0169" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_70F4DA23A8C4A6B47F14D6C35F8A8CC2" xlink:to="loc_us-gaap_EmployeeStockOptionMember_FC531A8A20E72DBCAB2AD6C35F8A0169" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_264C358BCC2ADE3DC579D6C35F8AC8EB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesNameDomain_70F4DA23A8C4A6B47F14D6C35F8A8CC2" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_264C358BCC2ADE3DC579D6C35F8AC8EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_509A3985D5D7B12F581CD6C35F8ADFDE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTable_A8A4DF16C1AF52FB5764D6C35F890C15" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_509A3985D5D7B12F581CD6C35F8ADFDE" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AntidilutiveSecuritiesAbstract" xlink:label="loc_qlys_AntidilutiveSecuritiesAbstract_1DA99AD4882D43710732D6C35F8B4E7F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareLineItems_509A3985D5D7B12F581CD6C35F8ADFDE" xlink:to="loc_qlys_AntidilutiveSecuritiesAbstract_1DA99AD4882D43710732D6C35F8B4E7F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount" xlink:label="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_BA6AD8D516706F5FD103D6C35F8B5C08" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_AntidilutiveSecuritiesAbstract_1DA99AD4882D43710732D6C35F8B4E7F" xlink:to="loc_us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_BA6AD8D516706F5FD103D6C35F8B5C08" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/NetIncomePerShareTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_F76A68E072490C1D2E47D6C35F34A63E" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_B15BFAB17AE3AC5F5372D6C35F354F8F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_F76A68E072490C1D2E47D6C35F34A63E" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareBasicAndDilutedTableTextBlock_B15BFAB17AE3AC5F5372D6C35F354F8F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock" xlink:label="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_16D7B52E7395527671B7D6C35F35F406" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EarningsPerShareAbstract_F76A68E072490C1D2E47D6C35F34A63E" xlink:to="loc_us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_16D7B52E7395527671B7D6C35F35F406" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/PropertyAndEquipmentNet" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_37C698ED74EABF7ADA06E14A456F55CB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_E37AF787C01897844C6DE14A456F6AFE" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_37C698ED74EABF7ADA06E14A456F55CB" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_E37AF787C01897844C6DE14A456F6AFE" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/PropertyAndEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_1118851673ECA2986E42E19F7E3ECF78" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6C9DF0F9B8D1AAED4F19E19F7E3E253F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_1118851673ECA2986E42E19F7E3ECF78" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6C9DF0F9B8D1AAED4F19E19F7E3E253F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_B38A8BE7BF62C0E0BC8EE19F7E3F0467" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6C9DF0F9B8D1AAED4F19E19F7E3E253F" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_B38A8BE7BF62C0E0BC8EE19F7E3F0467" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_68610EBEE7CF9D68E632E19F7E3F3442" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_B38A8BE7BF62C0E0BC8EE19F7E3F0467" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_68610EBEE7CF9D68E632E19F7E3F3442" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComputerEquipmentMember" xlink:label="loc_us-gaap_ComputerEquipmentMember_166F8D0B643D86395574E19F7E3F4764" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_68610EBEE7CF9D68E632E19F7E3F3442" xlink:to="loc_us-gaap_ComputerEquipmentMember_166F8D0B643D86395574E19F7E3F4764" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_780DF6EC17C5AA80E788E19F7E3F8E4C" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_68610EBEE7CF9D68E632E19F7E3F3442" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_780DF6EC17C5AA80E788E19F7E3F8E4C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FurnitureAndFixturesMember" xlink:label="loc_us-gaap_FurnitureAndFixturesMember_FEC7228982001B1D2A4BE19F7E40760A" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_68610EBEE7CF9D68E632E19F7E3F3442" xlink:to="loc_us-gaap_FurnitureAndFixturesMember_FEC7228982001B1D2A4BE19F7E40760A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsHeldUnderCapitalLeasesMember" xlink:label="loc_us-gaap_AssetsHeldUnderCapitalLeasesMember_87DA277D971B5FA81DF6E19F7E405233" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_68610EBEE7CF9D68E632E19F7E3F3442" xlink:to="loc_us-gaap_AssetsHeldUnderCapitalLeasesMember_87DA277D971B5FA81DF6E19F7E405233" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ScannerAppliancesMember" xlink:label="loc_qlys_ScannerAppliancesMember_008801A9C68B6104FA2BE19F7E40A6FC" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_68610EBEE7CF9D68E632E19F7E3F3442" xlink:to="loc_qlys_ScannerAppliancesMember_008801A9C68B6104FA2BE19F7E40A6FC" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ScannerAppliancesAndOtherComputerEquipmentSubjectToSubscriptionMember" xlink:label="loc_qlys_ScannerAppliancesAndOtherComputerEquipmentSubjectToSubscriptionMember_86C0A59CD2961BE0C1F5E19F7E40DC8E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScannerAppliancesMember_008801A9C68B6104FA2BE19F7E40A6FC" xlink:to="loc_qlys_ScannerAppliancesAndOtherComputerEquipmentSubjectToSubscriptionMember_86C0A59CD2961BE0C1F5E19F7E40DC8E" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ScannerAppliancesAndOtherComputerEquipmentNotPlacedInServiceMember" xlink:label="loc_qlys_ScannerAppliancesAndOtherComputerEquipmentNotPlacedInServiceMember_CBE54E904F1A6BAAAEBFE19F7E402905" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ScannerAppliancesMember_008801A9C68B6104FA2BE19F7E40A6FC" xlink:to="loc_qlys_ScannerAppliancesAndOtherComputerEquipmentNotPlacedInServiceMember_CBE54E904F1A6BAAAEBFE19F7E402905" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_8BC91A1D9D3382EAA7AEE19F7E418F6F" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_68610EBEE7CF9D68E632E19F7E3F3442" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_8BC91A1D9D3382EAA7AEE19F7E418F6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_37CC5BEF9C0E01E3A4C6E19F7E413027" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_6C9DF0F9B8D1AAED4F19E19F7E3E253F" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentLineItems_37CC5BEF9C0E01E3A4C6E19F7E413027" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_F4FD899C71FF7649C2ABE19F7E41D05A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_37CC5BEF9C0E01E3A4C6E19F7E413027" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_F4FD899C71FF7649C2ABE19F7E41D05A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FinanceLeaseRightOfUseAsset" xlink:label="loc_us-gaap_FinanceLeaseRightOfUseAsset_02BEEBFF3FC08803E80AE19F7E416BC2" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_37CC5BEF9C0E01E3A4C6E19F7E413027" xlink:to="loc_us-gaap_FinanceLeaseRightOfUseAsset_02BEEBFF3FC08803E80AE19F7E416BC2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_AA40593A22E11469D3BEE19F7E4140A3" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_37CC5BEF9C0E01E3A4C6E19F7E413027" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_AA40593A22E11469D3BEE19F7E4140A3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_6C9B8E67AF222F3E1C8BE19F7E4144AF" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/totalLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_37CC5BEF9C0E01E3A4C6E19F7E413027" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_6C9B8E67AF222F3E1C8BE19F7E4144AF" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_DepreciationDepletionAndAmortizationExcludingIntangibleAssetAmortization" xlink:label="loc_qlys_DepreciationDepletionAndAmortizationExcludingIntangibleAssetAmortization_65A0BBC1CE575885492EE19F7E42518F" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_37CC5BEF9C0E01E3A4C6E19F7E413027" xlink:to="loc_qlys_DepreciationDepletionAndAmortizationExcludingIntangibleAssetAmortization_65A0BBC1CE575885492EE19F7E42518F" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AccumulatedDepreciationCapitalLeases" xlink:label="loc_qlys_AccumulatedDepreciationCapitalLeases_41E6677A17E37FE3A366E19F7E428EFC" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_37CC5BEF9C0E01E3A4C6E19F7E413027" xlink:to="loc_qlys_AccumulatedDepreciationCapitalLeases_41E6677A17E37FE3A366E19F7E428EFC" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/PropertyAndEquipmentNetTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentAbstract" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentAbstract_E82380A06E2AFCA7265DE14A456DA2EE" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_D22B9416421BB26B4A4EE14A456D2D45" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentAbstract_E82380A06E2AFCA7265DE14A456DA2EE" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTextBlock_D22B9416421BB26B4A4EE14A456D2D45" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/RevenueFromContractsWithCustomers" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_0F0F2CD55FF4394981F4E14A456093F9" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerTextBlock" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerTextBlock_CDF82B848AADC728F39EE14A4561703D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_0F0F2CD55FF4394981F4E14A456093F9" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerTextBlock_CDF82B848AADC728F39EE14A4561703D" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/RevenueFromContractsWithCustomersCommissionAssetBalancesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_D2BAD85AA27A8FEC5C7DD6C35E8EA1E2" xlink:type="locator" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_CommissionAssetCurrent" xlink:label="loc_qlys_CommissionAssetCurrent_5EE3620545314CD1367BD6C35E8E8C93" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_D2BAD85AA27A8FEC5C7DD6C35E8EA1E2" xlink:to="loc_qlys_CommissionAssetCurrent_5EE3620545314CD1367BD6C35E8E8C93" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_CommissionAssetNoncurrent" xlink:label="loc_qlys_CommissionAssetNoncurrent_A9C336CDCD20A121128FD6C35E8FD5E1" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_D2BAD85AA27A8FEC5C7DD6C35E8EA1E2" xlink:to="loc_qlys_CommissionAssetNoncurrent_A9C336CDCD20A121128FD6C35E8FD5E1" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/RevenueFromContractsWithCustomersNarrativeDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_2FD907E939122944EE21E0F3CC65B574" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_84719D843B70EC0FDFCAE0F3CC65B1B1" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_2FD907E939122944EE21E0F3CC65B574" xlink:to="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_84719D843B70EC0FDFCAE0F3CC65B1B1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductOrServiceAxis" xlink:label="loc_srt_ProductOrServiceAxis_CE1DF681A336FC2AB842E0F3CC653131" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_84719D843B70EC0FDFCAE0F3CC65B1B1" xlink:to="loc_srt_ProductOrServiceAxis_CE1DF681A336FC2AB842E0F3CC653131" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ProductsAndServicesDomain" xlink:label="loc_srt_ProductsAndServicesDomain_D87DF2038483FE65892BE0F3CC653FBA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductOrServiceAxis_CE1DF681A336FC2AB842E0F3CC653131" xlink:to="loc_srt_ProductsAndServicesDomain_D87DF2038483FE65892BE0F3CC653FBA" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_SubscriptionRevenueMember" xlink:label="loc_qlys_SubscriptionRevenueMember_445833CE848255F1836FE0F3CC65677D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ProductsAndServicesDomain_D87DF2038483FE65892BE0F3CC653FBA" xlink:to="loc_qlys_SubscriptionRevenueMember_445833CE848255F1836FE0F3CC65677D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems" xlink:label="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_6E29C5563C9FA424C331E0F3CC650370" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionTable_84719D843B70EC0FDFCAE0F3CC65B1B1" xlink:to="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_6E29C5563C9FA424C331E0F3CC650370" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalizedContractCostImpairmentLoss" xlink:label="loc_us-gaap_CapitalizedContractCostImpairmentLoss_83C11AB874041721619DE11EFE7F5C32" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_6E29C5563C9FA424C331E0F3CC650370" xlink:to="loc_us-gaap_CapitalizedContractCostImpairmentLoss_83C11AB874041721619DE11EFE7F5C32" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CapitalizedContractCostAmortizationPeriod" xlink:label="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_FB44A9D1B3EBB2805F81E0F3CC654E04" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_6E29C5563C9FA424C331E0F3CC650370" xlink:to="loc_us-gaap_CapitalizedContractCostAmortizationPeriod_FB44A9D1B3EBB2805F81E0F3CC654E04" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_FAD8A3A80AE151C746A4E0F3CC655324" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_6E29C5563C9FA424C331E0F3CC650370" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_FAD8A3A80AE151C746A4E0F3CC655324" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfDeferredSalesCommissions" xlink:label="loc_us-gaap_AmortizationOfDeferredSalesCommissions_BD7DC31C504FCD961279E0F3CC658696" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_6E29C5563C9FA424C331E0F3CC650370" xlink:to="loc_us-gaap_AmortizationOfDeferredSalesCommissions_BD7DC31C504FCD961279E0F3CC658696" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_B53F3BE3885B251460B1E0F3CC657843" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueInitialApplicationPeriodCumulativeEffectTransitionLineItems_6E29C5563C9FA424C331E0F3CC650370" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_B53F3BE3885B251460B1E0F3CC657843" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/RevenueFromContractsWithCustomersRevenueBySalesChannelDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_F59FBBA0F93769EE3A5DD6C35EE20AC4" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_4CC537D971DC83501BEFD6C35EE25D45" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_F59FBBA0F93769EE3A5DD6C35EE20AC4" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_4CC537D971DC83501BEFD6C35EE25D45" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelAxis" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelAxis_0F3F2416E2D9C05874FFD6C35EE2F2BD" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_4CC537D971DC83501BEFD6C35EE25D45" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelAxis_0F3F2416E2D9C05874FFD6C35EE2F2BD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerSalesChannelDomain" xlink:label="loc_us-gaap_ContractWithCustomerSalesChannelDomain_FF18D47A41ECD6F1A35ED6C35EE38781" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelAxis_0F3F2416E2D9C05874FFD6C35EE2F2BD" xlink:to="loc_us-gaap_ContractWithCustomerSalesChannelDomain_FF18D47A41ECD6F1A35ED6C35EE38781" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SalesChannelDirectlyToConsumerMember" xlink:label="loc_us-gaap_SalesChannelDirectlyToConsumerMember_CD01B6F4DF786EDFF91CD6C35EE34343" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_FF18D47A41ECD6F1A35ED6C35EE38781" xlink:to="loc_us-gaap_SalesChannelDirectlyToConsumerMember_CD01B6F4DF786EDFF91CD6C35EE34343" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SalesChannelThroughIntermediaryMember" xlink:label="loc_us-gaap_SalesChannelThroughIntermediaryMember_DD2F58CA25965DBAD446D6C35EE3AEAD" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ContractWithCustomerSalesChannelDomain_FF18D47A41ECD6F1A35ED6C35EE38781" xlink:to="loc_us-gaap_SalesChannelThroughIntermediaryMember_DD2F58CA25965DBAD446D6C35EE3AEAD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_2B931E70F479713966BED6C35EE30E87" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_4CC537D971DC83501BEFD6C35EE25D45" xlink:to="loc_us-gaap_DisaggregationOfRevenueLineItems_2B931E70F479713966BED6C35EE30E87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_479D9F7E0D8367D16B5BD6C35EE40345" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_2B931E70F479713966BED6C35EE30E87" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_479D9F7E0D8367D16B5BD6C35EE40345" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/RevenueFromContractsWithCustomersTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_8D946E01E7A270F90678E14A455C9CCE" xlink:type="locator" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ContractWithCustomerCommissionAssetBalancesTableTextBlock" xlink:label="loc_qlys_ContractWithCustomerCommissionAssetBalancesTableTextBlock_BDB2571A569151AEF16BE14A455D9B89" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_8D946E01E7A270F90678E14A455C9CCE" xlink:to="loc_qlys_ContractWithCustomerCommissionAssetBalancesTableTextBlock_BDB2571A569151AEF16BE14A455D9B89" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock" xlink:label="loc_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_5908058506C95749CA82E14A455D2078" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_8D946E01E7A270F90678E14A455C9CCE" xlink:to="loc_us-gaap_ContractWithCustomerAssetAndLiabilityTableTextBlock_5908058506C95749CA82E14A455D2078" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTableTextBlock" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTableTextBlock_BDA0D63EC5D9E1C84C06E14A455DD91E" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_8D946E01E7A270F90678E14A455C9CCE" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionTableTextBlock_BDA0D63EC5D9E1C84C06E14A455DD91E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock" xlink:label="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_6C4F02FB0092E205B134E14A455DE7F3" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_8D946E01E7A270F90678E14A455C9CCE" xlink:to="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_6C4F02FB0092E205B134E14A455DE7F3" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/RevenueFromContractsWithCustomersUnbilledContractsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_C13F2AC70C40BCD4B2AFD6C35F23A018" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligation" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligation_03C4C57D195783E04239D6C35F249DC7" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_C13F2AC70C40BCD4B2AFD6C35F23A018" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligation_03C4C57D195783E04239D6C35F249DC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_BA8D708181FB2860ADB6D6C35F24F1D3" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_C13F2AC70C40BCD4B2AFD6C35F23A018" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_BA8D708181FB2860ADB6D6C35F24F1D3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_2DF14AE16629D24CF920D6C35F243127" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_BA8D708181FB2860ADB6D6C35F24F1D3" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionStartDateAxis_2DF14AE16629D24CF920D6C35F243127" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_44EB5731CDF9EE3BE703D6C35F24312A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_BA8D708181FB2860ADB6D6C35F24F1D3" xlink:to="loc_us-gaap_DisaggregationOfRevenueLineItems_44EB5731CDF9EE3BE703D6C35F24312A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1" xlink:label="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_C235534D7F51A4819844D6C35F250D77" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_44EB5731CDF9EE3BE703D6C35F24312A" xlink:to="loc_us-gaap_RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1_C235534D7F51A4819844D6C35F250D77" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/SegmentInformationAndInformationAboutGeographicArea" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_C357CBA52ED190030172D6C35E53AF30" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingDisclosureTextBlock" xlink:label="loc_us-gaap_SegmentReportingDisclosureTextBlock_6B73DE6CFE4C403877E0D6C35E53B521" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_C357CBA52ED190030172D6C35E53AF30" xlink:to="loc_us-gaap_SegmentReportingDisclosureTextBlock_6B73DE6CFE4C403877E0D6C35E53B521" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/SegmentInformationAndInformationAboutGeographicAreaPropertyAndEquipmentNetDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_97770DE43BC22F140690E14A4432F3C5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_517A973F13C35218BC57E14A44323598" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_97770DE43BC22F140690E14A4432F3C5" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_517A973F13C35218BC57E14A44323598" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_414BD00F8566479B4B8AE14A4442A84D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_517A973F13C35218BC57E14A44323598" xlink:to="loc_srt_StatementGeographicalAxis_414BD00F8566479B4B8AE14A4442A84D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_648B91C019CA7A281CC3E14A444242AB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_StatementGeographicalAxis_414BD00F8566479B4B8AE14A4442A84D" xlink:to="loc_srt_SegmentGeographicalDomain_648B91C019CA7A281CC3E14A444242AB" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_A217A7D56EFBA9680B95E14A4442DEC2" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_SegmentGeographicalDomain_648B91C019CA7A281CC3E14A444242AB" xlink:to="loc_country_US_A217A7D56EFBA9680B95E14A4442DEC2" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_OtherGeographicAreasMember" xlink:label="loc_qlys_OtherGeographicAreasMember_A91DE161395781D6E953E14A444374E7" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_SegmentGeographicalDomain_648B91C019CA7A281CC3E14A444242AB" xlink:to="loc_qlys_OtherGeographicAreasMember_A91DE161395781D6E953E14A444374E7" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_IN" xlink:label="loc_country_IN_E69F41655E26B09F4948E183D49E6D50" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_SegmentGeographicalDomain_648B91C019CA7A281CC3E14A444242AB" xlink:to="loc_country_IN_E69F41655E26B09F4948E183D49E6D50" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingInformationLineItems" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_9110A168FCF30E1F3141E14A4443020F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_517A973F13C35218BC57E14A44323598" xlink:to="loc_us-gaap_SegmentReportingInformationLineItems_9110A168FCF30E1F3141E14A4443020F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_58CB3BBC0B99AC076797E14A4443260A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9110A168FCF30E1F3141E14A4443020F" xlink:to="loc_us-gaap_NumberOfOperatingSegments_58CB3BBC0B99AC076797E14A4443260A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_7926BFC51AA308093289E14A4444D651" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_9110A168FCF30E1F3141E14A4443020F" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_7926BFC51AA308093289E14A4444D651" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/SegmentInformationAndInformationAboutGeographicAreaRevenueByGeographicAreaDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerAbstract" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerAbstract_FD13B03C0F3684DB7A3DD6C35EA85341" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTable" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_1E4599BBE256B1A0849CD6C35EA82A9C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerAbstract_FD13B03C0F3684DB7A3DD6C35EA85341" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_1E4599BBE256B1A0849CD6C35EA82A9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementGeographicalAxis" xlink:label="loc_srt_StatementGeographicalAxis_EFC84652554434F6A306D6C35EA8DC4D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_1E4599BBE256B1A0849CD6C35EA82A9C" xlink:to="loc_srt_StatementGeographicalAxis_EFC84652554434F6A306D6C35EA8DC4D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_SegmentGeographicalDomain" xlink:label="loc_srt_SegmentGeographicalDomain_CFF14B14FAA9D77CE46AD6C35EA83B8E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_StatementGeographicalAxis_EFC84652554434F6A306D6C35EA8DC4D" xlink:to="loc_srt_SegmentGeographicalDomain_CFF14B14FAA9D77CE46AD6C35EA83B8E" xlink:type="arc" />
    <link:loc xlink:href="https://xbrl.sec.gov/country/2017/country-2017-01-31.xsd#country_US" xlink:label="loc_country_US_A581F21D17E5193615E7D6C35EA93206" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_SegmentGeographicalDomain_CFF14B14FAA9D77CE46AD6C35EA83B8E" xlink:to="loc_country_US_A581F21D17E5193615E7D6C35EA93206" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_OtherGeographicAreasMember" xlink:label="loc_qlys_OtherGeographicAreasMember_44CE97C5B9ED6A56AE7CD6C35EA929CE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_SegmentGeographicalDomain_CFF14B14FAA9D77CE46AD6C35EA83B8E" xlink:to="loc_qlys_OtherGeographicAreasMember_44CE97C5B9ED6A56AE7CD6C35EA929CE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_A36B3E7E479FE51045C9D6C35EA9DB8B" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_1E4599BBE256B1A0849CD6C35EA82A9C" xlink:to="loc_us-gaap_DisaggregationOfRevenueLineItems_A36B3E7E479FE51045C9D6C35EA9DB8B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_4BF142A4D3D4FBFB8523D6C35EA9EA0F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_A36B3E7E479FE51045C9D6C35EA9DB8B" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_4BF142A4D3D4FBFB8523D6C35EA9EA0F" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/SegmentInformationAndInformationAboutGeographicAreaTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SegmentReportingAbstract" xlink:label="loc_us-gaap_SegmentReportingAbstract_418A52B5233EF24216B3D6C35EA437AB" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock" xlink:label="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_CF1969B3BF3042AC0A64D6C35EA407F4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_418A52B5233EF24216B3D6C35EA437AB" xlink:to="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_CF1969B3BF3042AC0A64D6C35EA407F4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_ED9F703085B6D0919014D6C35EA426AE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_SegmentReportingAbstract_418A52B5233EF24216B3D6C35EA437AB" xlink:to="loc_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock_ED9F703085B6D0919014D6C35EA426AE" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/StockBasedCompensation" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_96850C568B474AFF1CADD6C35F2F8297" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_5CB2BF2740F121EFC100D6C35F2F0A54" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_96850C568B474AFF1CADD6C35F2F8297" xlink:to="loc_us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_5CB2BF2740F121EFC100D6C35F2F0A54" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/StockBasedCompensationExpenseDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_2A85B76C063FB971E448DFC1766F00E3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_211C0550ADB74E1A4493DFC1766FDAE3" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_2A85B76C063FB971E448DFC1766F00E3" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_211C0550ADB74E1A4493DFC1766FDAE3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="loc_us-gaap_IncomeStatementLocationAxis_F7B94B3299DC6D21BD33DFC1766F3554" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_211C0550ADB74E1A4493DFC1766FDAE3" xlink:to="loc_us-gaap_IncomeStatementLocationAxis_F7B94B3299DC6D21BD33DFC1766F3554" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_DC48FDE5A4C519DD8C6DDFC1766F9B3A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationAxis_F7B94B3299DC6D21BD33DFC1766F3554" xlink:to="loc_us-gaap_IncomeStatementLocationDomain_DC48FDE5A4C519DD8C6DDFC1766F9B3A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfSalesMember" xlink:label="loc_us-gaap_CostOfSalesMember_D087C8E981E003A1BF1ADFC1766F72B5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_DC48FDE5A4C519DD8C6DDFC1766F9B3A" xlink:to="loc_us-gaap_CostOfSalesMember_D087C8E981E003A1BF1ADFC1766F72B5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseMember" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseMember_BF47A16106B38F24CF76DFC1766F8BD8" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_DC48FDE5A4C519DD8C6DDFC1766F9B3A" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpenseMember_BF47A16106B38F24CF76DFC1766F8BD8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingAndMarketingExpenseMember" xlink:label="loc_us-gaap_SellingAndMarketingExpenseMember_185EFEC92671EC499F30DFC1766F0CD8" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_DC48FDE5A4C519DD8C6DDFC1766F9B3A" xlink:to="loc_us-gaap_SellingAndMarketingExpenseMember_185EFEC92671EC499F30DFC1766F0CD8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GeneralAndAdministrativeExpenseMember" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpenseMember_81505CA5A1CDD7770BEBDFC1766F2096" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_IncomeStatementLocationDomain_DC48FDE5A4C519DD8C6DDFC1766F9B3A" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpenseMember_81505CA5A1CDD7770BEBDFC1766F2096" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_9D5980D658C934E46A6DDFC1766FD688" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_211C0550ADB74E1A4493DFC1766FDAE3" xlink:to="loc_us-gaap_AwardTypeAxis_9D5980D658C934E46A6DDFC1766FD688" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_19ACD1D320A64C2FF06BDFC1766F54EF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_9D5980D658C934E46A6DDFC1766FD688" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_19ACD1D320A64C2FF06BDFC1766F54EF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_9C5B4987B558322AD441DFC1766F2060" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_19ACD1D320A64C2FF06BDFC1766F54EF" xlink:to="loc_us-gaap_EmployeeStockOptionMember_9C5B4987B558322AD441DFC1766F2060" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_DB2F966EA398850534CEDFC1766F77CD" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_19ACD1D320A64C2FF06BDFC1766F54EF" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_DB2F966EA398850534CEDFC1766F77CD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_92318AB4E834D6FF1C1EDFC1766FAB9C" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_211C0550ADB74E1A4493DFC1766FDAE3" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_92318AB4E834D6FF1C1EDFC1766FAB9C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_E5319F2B40EF21E4A7F0DFC1766F36F0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_92318AB4E834D6FF1C1EDFC1766FAB9C" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_E5319F2B40EF21E4A7F0DFC1766F36F0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_D6803A1630E5CEAC1CA5DFC1766F621E" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_92318AB4E834D6FF1C1EDFC1766FAB9C" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_D6803A1630E5CEAC1CA5DFC1766F621E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_32D1F2D91C954018475EDFC1766F5812" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsLineItems_92318AB4E834D6FF1C1EDFC1766FAB9C" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_32D1F2D91C954018475EDFC1766F5812" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/StockBasedCompensationPerformanceBasedAwardsAndOptionsAndShareRepurchaseProgramdetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_02E9B7253A78AD1F7996E19F7C6C1458" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_35D5EC7AD9480D6D32FAE19F7C6CC59E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_02E9B7253A78AD1F7996E19F7C6C1458" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_35D5EC7AD9480D6D32FAE19F7C6CC59E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_StatementScenarioAxis" xlink:label="loc_srt_StatementScenarioAxis_5CFBDC2D1094F8B43BA1E1AE93F431BA" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_35D5EC7AD9480D6D32FAE19F7C6CC59E" xlink:to="loc_srt_StatementScenarioAxis_5CFBDC2D1094F8B43BA1E1AE93F431BA" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="loc_srt_ScenarioUnspecifiedDomain_CEE944305974BE7B7ADEE1AE93F5E950" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_StatementScenarioAxis_5CFBDC2D1094F8B43BA1E1AE93F431BA" xlink:to="loc_srt_ScenarioUnspecifiedDomain_CEE944305974BE7B7ADEE1AE93F5E950" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2019/elts/srt-2019-01-31.xsd#srt_ScenarioForecastMember" xlink:label="loc_srt_ScenarioForecastMember_CE87016D3A478B54B73CE1AEC01DB391" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_srt_ScenarioUnspecifiedDomain_CEE944305974BE7B7ADEE1AE93F5E950" xlink:to="loc_srt_ScenarioForecastMember_CE87016D3A478B54B73CE1AEC01DB391" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_F146350F22B3AD402754E19F7C723708" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_35D5EC7AD9480D6D32FAE19F7C6CC59E" xlink:to="loc_us-gaap_AwardTypeAxis_F146350F22B3AD402754E19F7C723708" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AB01D113199954AB9900E19F7C73E29F" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_F146350F22B3AD402754E19F7C723708" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AB01D113199954AB9900E19F7C73E29F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_5AB2F5A22CC13AA97F95E19F7C73E5D4" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AB01D113199954AB9900E19F7C73E29F" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_5AB2F5A22CC13AA97F95E19F7C73E5D4" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_6C18539F8FAB68C0B37FE19F7C73C07D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AB01D113199954AB9900E19F7C73E29F" xlink:to="loc_us-gaap_EmployeeStockOptionMember_6C18539F8FAB68C0B37FE19F7C73C07D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PerformanceSharesMember" xlink:label="loc_us-gaap_PerformanceSharesMember_EC88528CFC332E9D0ED4E19F7C731D56" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_AB01D113199954AB9900E19F7C73E29F" xlink:to="loc_us-gaap_PerformanceSharesMember_EC88528CFC332E9D0ED4E19F7C731D56" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingAxis" xlink:label="loc_us-gaap_VestingAxis_A1A93FD5EC627AECBFA5E19F7C74B324" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_35D5EC7AD9480D6D32FAE19F7C6CC59E" xlink:to="loc_us-gaap_VestingAxis_A1A93FD5EC627AECBFA5E19F7C74B324" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_VestingDomain" xlink:label="loc_us-gaap_VestingDomain_A0FADB0CEEDB951A48C6E19F7C74A90B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_VestingAxis_A1A93FD5EC627AECBFA5E19F7C74B324" xlink:to="loc_us-gaap_VestingDomain_A0FADB0CEEDB951A48C6E19F7C74A90B" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_TimebasedsharedbasedcompensationMember" xlink:label="loc_qlys_TimebasedsharedbasedcompensationMember_8384598B5D00381078D2E19F7C74CA1A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_VestingDomain_A0FADB0CEEDB951A48C6E19F7C74A90B" xlink:to="loc_qlys_TimebasedsharedbasedcompensationMember_8384598B5D00381078D2E19F7C74CA1A" xlink:type="arc" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_VestingDomain_A0FADB0CEEDB951A48C6E19F7C74A90B" xlink:to="loc_us-gaap_PerformanceSharesMember_EC88528CFC332E9D0ED4E19F7C731D56" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AwardVestingAxis" xlink:label="loc_qlys_AwardVestingAxis_DD91A8111AB2019F42F9E19F7C747314" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_35D5EC7AD9480D6D32FAE19F7C6CC59E" xlink:to="loc_qlys_AwardVestingAxis_DD91A8111AB2019F42F9E19F7C747314" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_AwardVestingDomain" xlink:label="loc_qlys_AwardVestingDomain_7CF7E87D5A95791C017FE19F7C756BB8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_AwardVestingAxis_DD91A8111AB2019F42F9E19F7C747314" xlink:to="loc_qlys_AwardVestingDomain_7CF7E87D5A95791C017FE19F7C756BB8" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationAward2018TrancheOneMember" xlink:label="loc_qlys_ShareBasedCompensationAward2018TrancheOneMember_CDB5455924885BC85EDCE19F7C75BD0C" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_AwardVestingDomain_7CF7E87D5A95791C017FE19F7C756BB8" xlink:to="loc_qlys_ShareBasedCompensationAward2018TrancheOneMember_CDB5455924885BC85EDCE19F7C75BD0C" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationAward2018TrancheTwoMember" xlink:label="loc_qlys_ShareBasedCompensationAward2018TrancheTwoMember_CC507DE29B8BFCCC37A3E19F7C758E58" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_AwardVestingDomain_7CF7E87D5A95791C017FE19F7C756BB8" xlink:to="loc_qlys_ShareBasedCompensationAward2018TrancheTwoMember_CC507DE29B8BFCCC37A3E19F7C758E58" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationAward2018TrancheThreeMember" xlink:label="loc_qlys_ShareBasedCompensationAward2018TrancheThreeMember_E95E7A020B25397A461CE19F7C75A644" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_AwardVestingDomain_7CF7E87D5A95791C017FE19F7C756BB8" xlink:to="loc_qlys_ShareBasedCompensationAward2018TrancheThreeMember_E95E7A020B25397A461CE19F7C75A644" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_35D5EC7AD9480D6D32FAE19F7C6CC59E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_BE53FF8EF2BD8B5FBE7EE19F7C764D2A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_BE53FF8EF2BD8B5FBE7EE19F7C764D2A" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationPercentageOfAwardsBasedOnAchievementOfPerformanceGoals" xlink:label="loc_qlys_ShareBasedCompensationPercentageOfAwardsBasedOnAchievementOfPerformanceGoals_0CD3E78D0D0AD0ECE66AE19F7C766765" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_qlys_ShareBasedCompensationPercentageOfAwardsBasedOnAchievementOfPerformanceGoals_0CD3E78D0D0AD0ECE66AE19F7C766765" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_SharebasedCompensationArrangementbySharebasedPaymentAwardVestingPeriodNumberOfQuarterlyPeriods" xlink:label="loc_qlys_SharebasedCompensationArrangementbySharebasedPaymentAwardVestingPeriodNumberOfQuarterlyPeriods_3A6C28685669AFF5301DE19F7C769492" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_qlys_SharebasedCompensationArrangementbySharebasedPaymentAwardVestingPeriodNumberOfQuarterlyPeriods_3A6C28685669AFF5301DE19F7C769492" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_03E8FBE5486841CD4461E19F7C7683A1" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_us-gaap_ShareBasedCompensation_03E8FBE5486841CD4461E19F7C7683A1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepurchaseAgreementsMaturities" xlink:label="loc_us-gaap_RepurchaseAgreementsMaturities_DF3DC92DC648B6BAB44FE19F7C76852B" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_us-gaap_RepurchaseAgreementsMaturities_DF3DC92DC648B6BAB44FE19F7C76852B" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_Aggregatenumberofsharesauthorizedforrepurchase" xlink:label="loc_qlys_Aggregatenumberofsharesauthorizedforrepurchase_070B690043BBF5BFA4ADE19F7C77E858" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_qlys_Aggregatenumberofsharesauthorizedforrepurchase_070B690043BBF5BFA4ADE19F7C77E858" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_E5A9F452ED8E01F60067E19F7C776400" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_E5A9F452ED8E01F60067E19F7C776400" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_920A13876592E14B0F0AE19F7C77AA22" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_920A13876592E14B0F0AE19F7C77AA22" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_161E90CA9C4516C42916E19F7C77FA93" xlink:type="locator" />
    <link:presentationArc order="9" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_161E90CA9C4516C42916E19F7C77FA93" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationVestingIncrements" xlink:label="loc_qlys_ShareBasedCompensationVestingIncrements_748FC5F17BB09AE587EAE19F7C77BEB5" xlink:type="locator" />
    <link:presentationArc order="10" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_qlys_ShareBasedCompensationVestingIncrements_748FC5F17BB09AE587EAE19F7C77BEB5" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationTerminationPeriodTrigger" xlink:label="loc_qlys_ShareBasedCompensationTerminationPeriodTrigger_60C87292C52778DFC968E19F7C77D67E" xlink:type="locator" />
    <link:presentationArc order="11" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_qlys_ShareBasedCompensationTerminationPeriodTrigger_60C87292C52778DFC968E19F7C77D67E" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationPercentageOfSharesThatWillVestUponTrigger" xlink:label="loc_qlys_ShareBasedCompensationPercentageOfSharesThatWillVestUponTrigger_B9E5AB593A58717BA869E19F7C77E6A5" xlink:type="locator" />
    <link:presentationArc order="12" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_qlys_ShareBasedCompensationPercentageOfSharesThatWillVestUponTrigger_B9E5AB593A58717BA869E19F7C77E6A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_3C698E8C4709B7D30A3DE19F7C78B291" xlink:type="locator" />
    <link:presentationArc order="13" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_3C698E8C4709B7D30A3DE19F7C78B291" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedinPeriodAsAPercentageOfTarget" xlink:label="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedinPeriodAsAPercentageOfTarget_FF8DD9ACF8AC52AD1BB3E19F7C78BDB5" xlink:type="locator" />
    <link:presentationArc order="14" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherthanOptionsVestedinPeriodAsAPercentageOfTarget_FF8DD9ACF8AC52AD1BB3E19F7C78BDB5" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsTargetNumberOfShares" xlink:label="loc_qlys_ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsTargetNumberOfShares_2E5F073DD370FC77E277E19F7C78B3AF" xlink:type="locator" />
    <link:presentationArc order="15" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_qlys_ShareBasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsTargetNumberOfShares_2E5F073DD370FC77E277E19F7C78B3AF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_10372A119F7B7130CC21E19F7C781811" xlink:type="locator" />
    <link:presentationArc order="16" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_FAC44728D475B4B4EBEEE19F7C754422" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_10372A119F7B7130CC21E19F7C781811" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/StockBasedCompensationRestrictedStockDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_BA69B6514FAD2B26FAE4D6C35F29BB14" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6E74E4DF1D818F10548AD6C35F290472" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_BA69B6514FAD2B26FAE4D6C35F29BB14" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6E74E4DF1D818F10548AD6C35F290472" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AwardTypeAxis" xlink:label="loc_us-gaap_AwardTypeAxis_D90689E70F20926555B0D6C35F29599D" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6E74E4DF1D818F10548AD6C35F290472" xlink:to="loc_us-gaap_AwardTypeAxis_D90689E70F20926555B0D6C35F29599D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D672E8F50E7D64B8C33FD6C35F2AF4A9" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_AwardTypeAxis_D90689E70F20926555B0D6C35F29599D" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D672E8F50E7D64B8C33FD6C35F2AF4A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RestrictedStockUnitsRSUMember" xlink:label="loc_us-gaap_RestrictedStockUnitsRSUMember_B9D9781D50A5AA2B2258D6C35F2A045E" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_D672E8F50E7D64B8C33FD6C35F2AF4A9" xlink:to="loc_us-gaap_RestrictedStockUnitsRSUMember_B9D9781D50A5AA2B2258D6C35F2A045E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6F2E7BD77B5B9F6D1C3DD6C35F2A26F6" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_6E74E4DF1D818F10548AD6C35F290472" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6F2E7BD77B5B9F6D1C3DD6C35F2A26F6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_E2893D52756680519600D6C35F2ABA8B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6F2E7BD77B5B9F6D1C3DD6C35F2A26F6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_E2893D52756680519600D6C35F2ABA8B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_47630C4A9816C6C27307D6C35F2B578A" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_E2893D52756680519600D6C35F2ABA8B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_47630C4A9816C6C27307D6C35F2B578A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_369C9728F393D801A2C4D6C35F2B3C91" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_E2893D52756680519600D6C35F2ABA8B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_369C9728F393D801A2C4D6C35F2B3C91" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_F01992B40519CF0980FFD6C35F2B0A97" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_E2893D52756680519600D6C35F2ABA8B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_F01992B40519CF0980FFD6C35F2B0A97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_6E07278921E3918A914FD6C35F2BE3FB" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_E2893D52756680519600D6C35F2ABA8B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_6E07278921E3918A914FD6C35F2BE3FB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4C5C7968D59F2DC8862AD6C35F2C2C87" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingRollForward_E2893D52756680519600D6C35F2ABA8B" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_4C5C7968D59F2DC8862AD6C35F2C2C87" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingNumber_6A2A4DD5AE2D5283503AD6C35F2C0484" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6F2E7BD77B5B9F6D1C3DD6C35F2A26F6" xlink:to="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingNumber_6A2A4DD5AE2D5283503AD6C35F2C0484" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B2DB5BCC10051B3D16A1D6C35F2CC127" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6F2E7BD77B5B9F6D1C3DD6C35F2A26F6" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B2DB5BCC10051B3D16A1D6C35F2CC127" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_EC2408B5A0831206FE3ED6C35F2CA426" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B2DB5BCC10051B3D16A1D6C35F2CC127" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_EC2408B5A0831206FE3ED6C35F2CA426" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_BCF908963959E9FAD28BD6C35F2CCBFB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B2DB5BCC10051B3D16A1D6C35F2CC127" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_BCF908963959E9FAD28BD6C35F2CCBFB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_3FF512B3F0A557271FC1D6C35F2C5749" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B2DB5BCC10051B3D16A1D6C35F2CC127" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_3FF512B3F0A557271FC1D6C35F2C5749" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_F51AADD1609D75977ED3D6C35F2D21D5" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B2DB5BCC10051B3D16A1D6C35F2CC127" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_F51AADD1609D75977ED3D6C35F2D21D5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_2600A60C0DCD632348F7D6C35F2D6FAB" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_B2DB5BCC10051B3D16A1D6C35F2CC127" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_2600A60C0DCD632348F7D6C35F2D6FAB" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_3C6D9ADF3F7A61ACB309D6C35F2D03E0" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6F2E7BD77B5B9F6D1C3DD6C35F2A26F6" xlink:to="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_3C6D9ADF3F7A61ACB309D6C35F2D03E0" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/StockBasedCompensationStockOptionPlanActivityDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_28E81D10B0B1FEFC9784D6C35EEE7594" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0843040D1D6BBE47BC4AD6C35EEE70E0" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_28E81D10B0B1FEFC9784D6C35EEE7594" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0843040D1D6BBE47BC4AD6C35EEE70E0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_837806F0AF7AF3185E5FD6C35EEEA51B" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0843040D1D6BBE47BC4AD6C35EEE70E0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_837806F0AF7AF3185E5FD6C35EEEA51B" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_05886E5B85954BBA3879D6C35EEE4BC7" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0843040D1D6BBE47BC4AD6C35EEE70E0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_05886E5B85954BBA3879D6C35EEE4BC7" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_7CC955C5348581C9AA23D6C35EEF7258" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0843040D1D6BBE47BC4AD6C35EEE70E0" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_7CC955C5348581C9AA23D6C35EEF7258" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_545FFF7720FA228696F4D6C35EEFE249" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0843040D1D6BBE47BC4AD6C35EEE70E0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_545FFF7720FA228696F4D6C35EEFE249" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_D798CF65A25BB4EE4761D6C35EEFE3EC" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_0843040D1D6BBE47BC4AD6C35EEE70E0" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_D798CF65A25BB4EE4761D6C35EEFE3EC" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_07521ADF70A15BA7537DD6C35EEF506F" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_28E81D10B0B1FEFC9784D6C35EEE7594" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber_07521ADF70A15BA7537DD6C35EEF506F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_F193C85441CA4420AFD4D6C35EEF5F6F" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_28E81D10B0B1FEFC9784D6C35EEE7594" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber_F193C85441CA4420AFD4D6C35EEF5F6F" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39439E154FBA09218040D6C35EEF7854" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_28E81D10B0B1FEFC9784D6C35EEE7594" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39439E154FBA09218040D6C35EEF7854" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_D22C2B96A25AB9C872E9D6C35EEFA2ED" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39439E154FBA09218040D6C35EEF7854" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_D22C2B96A25AB9C872E9D6C35EEFA2ED" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_FC262775D8E32C4ABD58D6C35EF017AD" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39439E154FBA09218040D6C35EEF7854" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_FC262775D8E32C4ABD58D6C35EF017AD" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_540E4805225A12BA7897D6C35EF06C10" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39439E154FBA09218040D6C35EEF7854" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_540E4805225A12BA7897D6C35EF06C10" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_EED75FDEDAE7784F3391D6C35EF012C0" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39439E154FBA09218040D6C35EEF7854" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_EED75FDEDAE7784F3391D6C35EF012C0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_4E0B8457615F80FCC43FD6C35EF05D6C" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_39439E154FBA09218040D6C35EEF7854" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_4E0B8457615F80FCC43FD6C35EF05D6C" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_939CB7232846169DA963D6C35EF06A85" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_28E81D10B0B1FEFC9784D6C35EEE7594" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageExercisePrice_939CB7232846169DA963D6C35EF06A85" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_491E4A24B51578BB7A09D6C35EF08556" xlink:type="locator" />
    <link:presentationArc order="6" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_28E81D10B0B1FEFC9784D6C35EEE7594" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice_491E4A24B51578BB7A09D6C35EF08556" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermAbstract" xlink:label="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermAbstract_1D3EE16BC0506EE1D1C7D6C35EF1E000" xlink:type="locator" />
    <link:presentationArc order="7" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_28E81D10B0B1FEFC9784D6C35EEE7594" xlink:to="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermAbstract_1D3EE16BC0506EE1D1C7D6C35EF1E000" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_B275576EFFCC98EFAED8D6C35EF1B5EB" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermAbstract_1D3EE16BC0506EE1D1C7D6C35EF1E000" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_B275576EFFCC98EFAED8D6C35EF1B5EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_DD37BC28272ECA1F7605D6C35EF11F0D" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermAbstract_1D3EE16BC0506EE1D1C7D6C35EF1E000" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingWeightedAverageRemainingContractualTerm1_DD37BC28272ECA1F7605D6C35EF11F0D" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_05113DD7E7F5D4D3B2B6D6C35EF14248" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermAbstract_1D3EE16BC0506EE1D1C7D6C35EF1E000" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageRemainingContractualTerm1_05113DD7E7F5D4D3B2B6D6C35EF14248" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract" xlink:label="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_3166750E03D9E03F9A3AD6C35EF15A2E" xlink:type="locator" />
    <link:presentationArc order="8" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_28E81D10B0B1FEFC9784D6C35EEE7594" xlink:to="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_3166750E03D9E03F9A3AD6C35EF15A2E" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_34A70F39528ECE675213D6C35EF24098" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_3166750E03D9E03F9A3AD6C35EF15A2E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_34A70F39528ECE675213D6C35EF24098" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_6889F4E7609F4B348B98D6C35EF228EB" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_3166750E03D9E03F9A3AD6C35EF15A2E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingAggregateIntrinsicValue_6889F4E7609F4B348B98D6C35EF228EB" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_BF96ADD7F455F68E9CB7D6C35EF22FB3" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_qlys_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract_3166750E03D9E03F9A3AD6C35EF15A2E" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue_BF96ADD7F455F68E9CB7D6C35EF22FB3" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/StockBasedCompensationStockOptionsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_F494C15882E3D851D284D6C35F3F39B6" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2FE0CE24B0F8F706DCF5D6C35F3F22A5" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_F494C15882E3D851D284D6C35F3F39B6" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2FE0CE24B0F8F706DCF5D6C35F3F22A5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameAxis" xlink:label="loc_us-gaap_PlanNameAxis_BFC8A2FDD894F70CEC91D6C35F3FFBDF" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2FE0CE24B0F8F706DCF5D6C35F3F22A5" xlink:to="loc_us-gaap_PlanNameAxis_BFC8A2FDD894F70CEC91D6C35F3FFBDF" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PlanNameDomain" xlink:label="loc_us-gaap_PlanNameDomain_72DA325295A98885AA95D6C35F3FD649" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameAxis_BFC8A2FDD894F70CEC91D6C35F3FFBDF" xlink:to="loc_us-gaap_PlanNameDomain_72DA325295A98885AA95D6C35F3FD649" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_A2012EquityIncentivePlanMember" xlink:label="loc_qlys_A2012EquityIncentivePlanMember_3EC9A43D085282AE2DD2D6C35F4029F8" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_72DA325295A98885AA95D6C35F3FD649" xlink:to="loc_qlys_A2012EquityIncentivePlanMember_3EC9A43D085282AE2DD2D6C35F4029F8" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_A2000EquityIncentivePlanMember" xlink:label="loc_qlys_A2000EquityIncentivePlanMember_678C011AFA49F8A6F535D6C35F40A0A9" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_PlanNameDomain_72DA325295A98885AA95D6C35F3FD649" xlink:to="loc_qlys_A2000EquityIncentivePlanMember_678C011AFA49F8A6F535D6C35F40A0A9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_796E617C007DF3AC07E2D6C35F401A0A" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_2FE0CE24B0F8F706DCF5D6C35F3F22A5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_796E617C007DF3AC07E2D6C35F401A0A" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9940978F49F42A0FBF05D6C35F403480" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_796E617C007DF3AC07E2D6C35F401A0A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_9940978F49F42A0FBF05D6C35F403480" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_82505E42CBB16705DE70D6C35F40DCB3" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_796E617C007DF3AC07E2D6C35F401A0A" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant_82505E42CBB16705DE70D6C35F40DCB3" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/StockBasedCompensationTables" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract" xlink:label="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_C5073239F47C27DE9CACD6C35F3164D5" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock" xlink:label="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_4C6BCCCF630F8B4B992ED6C35F316291" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_C5073239F47C27DE9CACD6C35F3164D5" xlink:to="loc_us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock_4C6BCCCF630F8B4B992ED6C35F316291" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_CFE0B3524C2C8E843618D6C35F310ACE" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_C5073239F47C27DE9CACD6C35F3164D5" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_CFE0B3524C2C8E843618D6C35F310ACE" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock_7C2E54BD1D8F413199A2D6C35F31FB1A" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract_C5073239F47C27DE9CACD6C35F3164D5" xlink:to="loc_us-gaap_ScheduleOfNonvestedRestrictedStockUnitsActivityTableTextBlock_7C2E54BD1D8F413199A2D6C35F31FB1A" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/StockholdersEquity" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityAbstract" xlink:label="loc_us-gaap_EquityAbstract_7AEAC9714CFB5F831F9BE0BEFD051E20" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:label="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock_3139D53B443DABEC2463E0BEFD05AA84" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityAbstract_7AEAC9714CFB5F831F9BE0BEFD051E20" xlink:to="loc_us-gaap_StockholdersEquityNoteDisclosureTextBlock_3139D53B443DABEC2463E0BEFD05AA84" xlink:type="arc" />
  </link:presentationLink>
  <link:presentationLink xlink:role="http://www.qualys.com/role/StockholdersEquityDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EquityAbstract" xlink:label="loc_us-gaap_EquityAbstract_DC907F81FD95EBC65423DC514D151762" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchaseProgramAuthorizedAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_AE22B598A5B9BB2F7109DC514D171A98" xlink:type="locator" />
    <link:presentationArc order="1" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityAbstract_DC907F81FD95EBC65423DC514D151762" xlink:to="loc_us-gaap_StockRepurchaseProgramAuthorizedAmount1_AE22B598A5B9BB2F7109DC514D171A98" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockSharesAcquired" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_A017224BCB8D169CF459DC514D187A08" xlink:type="locator" />
    <link:presentationArc order="2" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityAbstract_DC907F81FD95EBC65423DC514D151762" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_A017224BCB8D169CF459DC514D187A08" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_4B64AE6C5FCDBD2A32C7DC514D182F67" xlink:type="locator" />
    <link:presentationArc order="3" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityAbstract_DC907F81FD95EBC65423DC514D151762" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_4B64AE6C5FCDBD2A32C7DC514D182F67" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1" xlink:label="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_0DEF845CBE2574343E5DDC514D18AC9E" xlink:type="locator" />
    <link:presentationArc order="4" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityAbstract_DC907F81FD95EBC65423DC514D151762" xlink:to="loc_us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1_0DEF845CBE2574343E5DDC514D18AC9E" xlink:type="arc" />
    <link:loc xlink:href="qlys-20200331.xsd#qlys_Aggregatenumberofsharesauthorizedforrepurchase" xlink:label="loc_qlys_Aggregatenumberofsharesauthorizedforrepurchase_35704E9F37111DB7DFBDDC73C9782572" xlink:type="locator" />
    <link:presentationArc order="5" preferredLabel="http://www.xbrl.org/2003/role/terseLabel" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_us-gaap_EquityAbstract_DC907F81FD95EBC65423DC514D151762" xlink:to="loc_qlys_Aggregatenumberofsharesauthorizedforrepurchase_35704E9F37111DB7DFBDDC73C9782572" xlink:type="arc" />
  </link:presentationLink>
</link:linkbase>
