<?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:ns2="http://www.sec.gov/edgar/common">
    <headerData>
        <submissionType>144</submissionType>
        <filerInfo>
            <filer>
                <filerCredentials>
                    <cik>0001940974</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001288847</issuerCik>
            <issuerName>FIVE9 INC COM</issuerName>
            <secFileNumber>001-36383</secFileNumber>
            <issuerAddress>
                <ns2:street1>3001 Bishop Drive, Suite 350  </ns2:street1>
                <ns2:city>San Ramon</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>94583</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>9252012000</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>PANOS KOZANIAN</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Officer</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>COMMON</securitiesClassTitle>
            <brokerOrMarketmakerDetails>
                <name>Morgan Stanley Smith Barney LLC Executive Financial Services</name>
                <address>
                    <ns2:street1>1 New York Plaza</ns2:street1>
                    <ns2:street2>8th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>8994</noOfUnitsSold>
            <aggregateMarketValue>560506.08</aggregateMarketValue>
            <noOfUnitsOutstanding>73326608</noOfUnitsOutstanding>
            <approxSaleDate>03/04/2024</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>03/03/2024</acquiredDate>
            <natureOfAcquisitionTransaction>Restricted Stock Units</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>8994</amountOfSecuritiesAcquired>
            <paymentDate>03/03/2024</paymentDate>
            <natureOfPayment>N/A</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>03/04/2024</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>12/14/2022</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Panos Kozanian</signature>
        </noticeSignature>
    </formData>
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144
0001940974
XXXXXXXX
LIVE
0001288847
FIVE9 INC COM
001-36383
3001 Bishop Drive, Suite 350
San Ramon
CA
94583
9252012000
PANOS KOZANIAN
Officer
COMMON
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
8994
560506.08
73326608
03/04/2024
NASDAQ
Common
03/03/2024
Restricted Stock Units
Issuer
N
8994
03/03/2024
N/A
Y
03/04/2024
12/14/2022
/s/ Panos Kozanian