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  <xs:element id="fivn_DebtInstrumentCappedCallTransactionsSharesCoverage" abstract="false" name="DebtInstrumentCappedCallTransactionsSharesCoverage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="fivn_SharePriceOfCommonStockWithConversionPremium" abstract="false" name="SharePriceOfCommonStockWithConversionPremium" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="fivn_AdditionalPaidInCapitalUnwindingOfCappedCallsFromConversionOfConvertibleSecuritiesShares" abstract="false" name="AdditionalPaidInCapitalUnwindingOfCappedCallsFromConversionOfConvertibleSecuritiesShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="fivn_AmortizationOfDeferredContractAcquisitionCosts" abstract="false" name="AmortizationOfDeferredContractAcquisitionCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fivn_ClosingPriceOfCommonStock" abstract="false" name="ClosingPriceOfCommonStock" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="fivn_DebtInstrumentConvertibleTradingDaysPrecedingRedemptionNotice" abstract="false" name="DebtInstrumentConvertibleTradingDaysPrecedingRedemptionNotice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="fivn_DebtInstrumentConvertibleNumberOfConversionFeaturesTriggered" abstract="false" name="DebtInstrumentConvertibleNumberOfConversionFeaturesTriggered" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="fivn_SalesandExciseTaxesPayableNoncurrent" abstract="false" name="SalesandExciseTaxesPayableNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fivn_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fivn_StockholdersEquityCapitalStructureLineItems" abstract="true" name="StockholdersEquityCapitalStructureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="fivn_DebtInstrumentConversionMultipleOfAggregatePrincipalAmount" abstract="false" name="DebtInstrumentConversionMultipleOfAggregatePrincipalAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fivn_LongTermMarketableInvestmentsMember" abstract="true" name="LongTermMarketableInvestmentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="fivn_LesseeOperatingLeaseLeaseNotYetCommencedAmount" abstract="false" name="LesseeOperatingLeaseLeaseNotYetCommencedAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fivn_IncreaseDecreaseinCapitalizedContractCost" abstract="false" name="IncreaseDecreaseinCapitalizedContractCost" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fivn_InferenceSolutionsMember" abstract="true" name="InferenceSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="fivn_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPerformancePeriods" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPerformancePeriods" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="fivn_ScheduleOfBalanceSheetInformationRelatedToLeasesTableTextBlock" abstract="false" name="ScheduleOfBalanceSheetInformationRelatedToLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="fivn_DataCenterMember" abstract="true" name="DataCenterMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
