<?xml version="1.0" encoding="UTF-8"?><ns2:edgarSubmission xmlns:com="http://www.sec.gov/edgar/common" xmlns:ns2="http://www.sec.gov/edgar/ownership">
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        <ns2:filerInfo>
            <ns2:filer>
                <ns2:filerCredentials>
                    <ns2:cik>0001903975</ns2:cik>
                    <ns2:ccc>XXXXXXXX</ns2:ccc>
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            </ns2:filer>
            <ns2:liveTestFlag>LIVE</ns2:liveTestFlag>



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    <ns2:formData>
        <ns2:issuerInfo>
            <ns2:issuerCik>0001561550</ns2:issuerCik>
            <ns2:issuerName>Datadog, Inc.</ns2:issuerName>
            <ns2:secFileNumber>001-39051</ns2:secFileNumber>
            <ns2:issuerAddress>
                <com:street1>620 8th Avenue</com:street1>
                <com:street2>45th Floor</com:street2>
                <com:city>New York</com:city>
                <com:stateOrCountry>NY</com:stateOrCountry>
                <com:zipCode>10018</com:zipCode>
            </ns2:issuerAddress>
            <ns2:issuerContactPhone>1-866-329-4466</ns2:issuerContactPhone>
            <ns2:nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Kerry Acocella</ns2:nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
            <ns2:relationshipsToIssuer>
                <ns2:relationshipToIssuer>Officer</ns2:relationshipToIssuer>
            </ns2:relationshipsToIssuer>
        </ns2:issuerInfo>
        <ns2:securitiesInformation>
            <ns2:securitiesClassTitle>Class A Common Stock</ns2:securitiesClassTitle>
            <ns2:brokerOrMarketmakerDetails>
                <ns2:name>Goldman Sachs &amp; Co. LLC</ns2:name>
                <ns2:address>
                    <com:street1>200 West Street</com:street1>
                    <com:city>New York</com:city>
                    <com:stateOrCountry>NY</com:stateOrCountry>
                    <com:zipCode>10282</com:zipCode>
                </ns2:address>
            </ns2:brokerOrMarketmakerDetails>
            <ns2:noOfUnitsSold>2488</ns2:noOfUnitsSold>
            <ns2:aggregateMarketValue>412709.44</ns2:aggregateMarketValue>
            <ns2:noOfUnitsOutstanding>313213676</ns2:noOfUnitsOutstanding>
            <ns2:approxSaleDate>12/04/2024</ns2:approxSaleDate>
            <ns2:securitiesExchangeName>NASD</ns2:securitiesExchangeName>
        </ns2:securitiesInformation>
        <ns2:securitiesToBeSold>
            <ns2:securitiesClassTitle>Class A Common Stock</ns2:securitiesClassTitle>
            <ns2:acquiredDate>12/01/2024</ns2:acquiredDate>
            <ns2:natureOfAcquisitionTransaction>Acquired as compensation -- Restricted Stock Units</ns2:natureOfAcquisitionTransaction>
            <ns2:nameOfPersonfromWhomAcquired>Issuer</ns2:nameOfPersonfromWhomAcquired>
            <ns2:isGiftTransaction>N</ns2:isGiftTransaction>
            <ns2:amountOfSecuritiesAcquired>2488</ns2:amountOfSecuritiesAcquired>
            <ns2:paymentDate>12/01/2024</ns2:paymentDate>
            <ns2:natureOfPayment>Compensation</ns2:natureOfPayment>
        </ns2:securitiesToBeSold>
        <ns2:nothingToReportFlagOnSecuritiesSoldInPast3Months>N</ns2:nothingToReportFlagOnSecuritiesSoldInPast3Months>
        <ns2:securitiesSoldInPast3Months>
            <ns2:sellerDetails>
                <ns2:name>Kerry Acocella</ns2:name>
                <ns2:address>
                    <com:street1>620 8th Avenue</com:street1>
                    <com:street2>45th Floor</com:street2>
                    <com:city>New York</com:city>
                    <com:stateOrCountry>NY</com:stateOrCountry>
                    <com:zipCode>10018</com:zipCode>
                </ns2:address>
            </ns2:sellerDetails>
            <ns2:securitiesClassTitle>Class A Common Stock</ns2:securitiesClassTitle>
            <ns2:saleDate>12/02/2024</ns2:saleDate>
            <ns2:amountOfSecuritiesSold>3175</ns2:amountOfSecuritiesSold>
            <ns2:grossProceeds>483044.5</ns2:grossProceeds>
        </ns2:securitiesSoldInPast3Months>
        <ns2:securitiesSoldInPast3Months>
            <ns2:sellerDetails>
                <ns2:name>Kerry Acocella</ns2:name>
                <ns2:address>
                    <com:street1>620 8th Avenue</com:street1>
                    <com:street2>45th Floor</com:street2>
                    <com:city>New York</com:city>
                    <com:stateOrCountry>NY</com:stateOrCountry>
                    <com:zipCode>10018</com:zipCode>
                </ns2:address>
            </ns2:sellerDetails>
            <ns2:securitiesClassTitle>Class A Common Stock</ns2:securitiesClassTitle>
            <ns2:saleDate>10/04/2024</ns2:saleDate>
            <ns2:amountOfSecuritiesSold>2452</ns2:amountOfSecuritiesSold>
            <ns2:grossProceeds>294396.68</ns2:grossProceeds>
        </ns2:securitiesSoldInPast3Months>
        <ns2:remarks>The sales of shares set forth herein are made in connection with a selling plan dated 3/15/2024 that is intended to comply with Rule 10b5-1(c). The representation below regarding the seller's knowledge of material information was true as of the date the selling plan was entered into.</ns2:remarks>
        <ns2:noticeSignature>
            <ns2:noticeDate>12/04/2024</ns2:noticeDate>
            <ns2:planAdoptionDates>
                <ns2:planAdoptionDate>03/15/2024</ns2:planAdoptionDate>
            </ns2:planAdoptionDates>
            <ns2:signature>Goldman Sachs &amp; Co. LLC on behalf of Goldman Sachs &amp; Co. LLC on behalf of Kerry Acocella</ns2:signature>
        </ns2:noticeSignature>
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144
0001903975
XXXXXXXX
LIVE
0001561550
Datadog, Inc.
001-39051
620 8th Avenue
45th Floor
New York
NY
10018
1-866-329-4466
Kerry Acocella
Officer
Class A Common Stock
Goldman Sachs & Co. LLC
200 West Street
New York
NY
10282
2488
412709.44
313213676
12/04/2024
NASD
Class A Common Stock
12/01/2024
Acquired as compensation -- Restricted Stock Units
Issuer
N
2488
12/01/2024
Compensation
N
Kerry Acocella
620 8th Avenue
45th Floor
New York
NY
10018
Class A Common Stock
12/02/2024
3175
483044.5
Kerry Acocella
620 8th Avenue
45th Floor
New York
NY
10018
Class A Common Stock
10/04/2024
2452
294396.68
The sales of shares set forth herein are made in connection with a selling plan dated 3/15/2024 that is intended to comply with Rule 10b5-1(c). The representation below regarding the seller's knowledge of material information was true as of the date the selling plan was entered into.
12/04/2024
03/15/2024
Goldman Sachs & Co. LLC on behalf of Goldman Sachs & Co. LLC on behalf of Kerry Acocella