content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
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      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001642337</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001889956</issuerCik>
        <issuerName>OneStream, Inc.</issuerName>
        <secFileNumber>001-42187</secFileNumber>
        <issuerAddress>
          <com:street1>191 N. CHESTER STREET</com:street1>
          <com:city>BIRMINGHAM</com:city>
          <com:stateOrCountry>MI</com:stateOrCountry>
          <com:zipCode>48009</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>(248) 650-1490</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Koefoed William A</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Fidelity Brokerage Services LLC</name>
          <address>
            <com:street1>900 Salem Street</com:street1>
            <com:city>Smithfield</com:city>
            <com:stateOrCountry>RI</com:stateOrCountry>
            <com:zipCode>02917</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>25000</noOfUnitsSold>
        <aggregateMarketValue>719000.00</aggregateMarketValue>
        <noOfUnitsOutstanding>75399202</noOfUnitsOutstanding>
        <approxSaleDate>05/27/2025</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <acquiredDate>05/27/2025</acquiredDate>
        <natureOfAcquisitionTransaction>Options Granted - 06/30/2022</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>25000</amountOfSecuritiesAcquired>
        <paymentDate>05/27/2025</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>05/27/2025</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>02/21/2025</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ Eric Janiak, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for William A. Koefoed Jr</signature>
      </noticeSignature>
    </formData>
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text: 144
  0001642337
  XXXXXXXX
  LIVE
  0001889956
  OneStream, Inc.
  001-42187
  191 N. CHESTER STREET
  BIRMINGHAM
  MI
  48009
  (248) 650-1490
  Koefoed William A
  Officer
  Class A
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  25000
  719000.00
  75399202
  05/27/2025
  NASDAQ
  Class A
  05/27/2025
  Options Granted - 06/30/2022
  Issuer
  N
  25000
  05/27/2025
  Cash
  Y
  05/27/2025
  02/21/2025
  /s/ Eric Janiak, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for William A. Koefoed Jr