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            <filer>
                <filerCredentials>
                    <cik>0001299634</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001713683</issuerCik>
            <issuerName>ZSCALER INC.</issuerName>
            <secFileNumber>001-38413</secFileNumber>
            <issuerAddress>
                <ns2:street1>120 Holger Way</ns2:street1>
                <ns2:city>San Jose</ns2:city>
                <ns2:stateOrCountry>CA</ns2:stateOrCountry>
                <ns2:zipCode>95134</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>(408) 533-0288</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>THE 2012 GIANNA MARIE GIANCARLO TRUST</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Board member</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>38th Floor</ns2:street2>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10004</ns2:zipCode>
                </address>
            </brokerOrMarketmakerDetails>
            <noOfUnitsSold>8912</noOfUnitsSold>
            <aggregateMarketValue>1759214.54</aggregateMarketValue>
            <noOfUnitsOutstanding>148323448</noOfUnitsOutstanding>
            <approxSaleDate>12/01/2023</approxSaleDate>
            <securitiesExchangeName>NASD</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>10/27/2017</acquiredDate>
            <natureOfAcquisitionTransaction>Gift from Affiliate</natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Charles Giancarlo</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>Y</isGiftTransaction>
            <donarAcquiredDate>10/27/2017</donarAcquiredDate>
            <amountOfSecuritiesAcquired>8912</amountOfSecuritiesAcquired>
            <natureOfPayment>NA</natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <noticeSignature>
            <noticeDate>12/01/2023</noticeDate>
            <planAdoptionDates/>
            <signature>/s/ Charles Henry Giancarlo, Trustee</signature>
        </noticeSignature>
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144
0001299634
XXXXXXXX
LIVE
0001713683
ZSCALER INC.
001-38413
120 Holger Way
San Jose
CA
95134
(408) 533-0288
THE 2012 GIANNA MARIE GIANCARLO TRUST
Board member
Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
38th Floor
New York
NY
10004
8912
1759214.54
148323448
12/01/2023
NASD
Common
10/27/2017
Gift from Affiliate
Charles Giancarlo
Y
10/27/2017
8912
NA
Y
12/01/2023
/s/ Charles Henry Giancarlo, Trustee