<?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>0001783882</cik>
                    <ccc>XXXXXXXX</ccc>
                </filerCredentials>
            </filer>
            <liveTestFlag>LIVE</liveTestFlag>



        </filerInfo>
    </headerData>
    <formData>
        <issuerInfo>
            <issuerCik>0001561550</issuerCik>
            <issuerName>Datadog, Inc.</issuerName>
            <secFileNumber>001-39051</secFileNumber>
            <issuerAddress>
                <ns2:street1>620 8th Avenue</ns2:street1>
                <ns2:city>New York</ns2:city>
                <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                <ns2:zipCode>10018</ns2:zipCode>
            </issuerAddress>
            <issuerContactPhone>8663294466</issuerContactPhone>
            <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>2019 Shah Family Trust</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <relationshipsToIssuer>
                <relationshipToIssuer>Director</relationshipToIssuer>
            </relationshipsToIssuer>
        </issuerInfo>
        <securitiesInformation>
            <securitiesClassTitle>Class A 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>7924</noOfUnitsSold>
            <aggregateMarketValue>1099851.20</aggregateMarketValue>
            <noOfUnitsOutstanding>319498060</noOfUnitsOutstanding>
            <approxSaleDate>07/15/2025</approxSaleDate>
            <securitiesExchangeName>NASDAQ</securitiesExchangeName>
        </securitiesInformation>
        <securitiesToBeSold>
            <securitiesClassTitle>Common</securitiesClassTitle>
            <acquiredDate>11/06/2012</acquiredDate>
            <natureOfAcquisitionTransaction>Fund distribution </natureOfAcquisitionTransaction>
            <nameOfPersonfromWhomAcquired>Affiliates of Index Venture Associates</nameOfPersonfromWhomAcquired>
            <isGiftTransaction>N</isGiftTransaction>
            <amountOfSecuritiesAcquired>7924</amountOfSecuritiesAcquired>
            <paymentDate>11/06/2012</paymentDate>
            <natureOfPayment>Fund distribution </natureOfPayment>
        </securitiesToBeSold>
        <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for 2019 SHAH FAMILY TRUST </name>
                <address>
                    <ns2:street1>620 8th Avenue</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10018</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Class A Common</securitiesClassTitle>
            <saleDate>06/16/2025</saleDate>
            <amountOfSecuritiesSold>7916</amountOfSecuritiesSold>
            <grossProceeds>956727.76</grossProceeds>
        </securitiesSoldInPast3Months>
        <securitiesSoldInPast3Months>
            <sellerDetails>
                <name>10b5-1 Sales for 2019 SHAH FAMILY TRUST </name>
                <address>
                    <ns2:street1>620 8th Avenue</ns2:street1>
                    <ns2:city>New York</ns2:city>
                    <ns2:stateOrCountry>NY</ns2:stateOrCountry>
                    <ns2:zipCode>10018</ns2:zipCode>
                </address>
            </sellerDetails>
            <securitiesClassTitle>Class A Common</securitiesClassTitle>
            <saleDate>06/04/2025</saleDate>
            <amountOfSecuritiesSold>23748</amountOfSecuritiesSold>
            <grossProceeds>2849760.00</grossProceeds>
        </securitiesSoldInPast3Months>
        <remarks>The securities to be sold were acquired upon a pro-rata distribution of a fund during the period of 11/6/2012 through 5/8/2019. </remarks>
        <noticeSignature>
            <noticeDate>07/15/2025</noticeDate>
            <planAdoptionDates>
                <planAdoptionDate>06/14/2024</planAdoptionDate>
            </planAdoptionDates>
            <signature>/s/ Shardul Gautam Shah</signature>
        </noticeSignature>
    </formData>
</edgarSubmission>
[{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4952}]
144
0001783882
XXXXXXXX
LIVE
0001561550
Datadog, Inc.
001-39051
620 8th Avenue
New York
NY
10018
8663294466
2019 Shah Family Trust
Director
Class A Common
Morgan Stanley Smith Barney LLC Executive Financial Services
1 New York Plaza
8th Floor
New York
NY
10004
7924
1099851.20
319498060
07/15/2025
NASDAQ
Common
11/06/2012
Fund distribution
Affiliates of Index Venture Associates
N
7924
11/06/2012
Fund distribution
N
10b5-1 Sales for 2019 SHAH FAMILY TRUST
620 8th Avenue
New York
NY
10018
Class A Common
06/16/2025
7916
956727.76
10b5-1 Sales for 2019 SHAH FAMILY TRUST
620 8th Avenue
New York
NY
10018
Class A Common
06/04/2025
23748
2849760.00
The securities to be sold were acquired upon a pro-rata distribution of a fund during the period of 11/6/2012 through 5/8/2019.
07/15/2025
06/14/2024
/s/ Shardul Gautam Shah