content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001621078</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>Kinzer John</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</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>30000</noOfUnitsSold>
        <aggregateMarketValue>847932.24</aggregateMarketValue>
        <noOfUnitsOutstanding>75399202</noOfUnitsOutstanding>
        <approxSaleDate>06/20/2025</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <acquiredDate>05/31/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Pre-IPO Shares</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>30000</amountOfSecuritiesAcquired>
        <paymentDate>05/31/2019</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>John E Kinzer Trust</name>
          <address>
            <com:street1>191 N. Chester Street</com:street1>
            <com:city>Birmingham</com:city>
            <com:stateOrCountry>MI</com:stateOrCountry>
            <com:zipCode>48009</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <saleDate>04/09/2025</saleDate>
        <amountOfSecuritiesSold>40000</amountOfSecuritiesSold>
        <grossProceeds>811047.35</grossProceeds>
      </securitiesSoldInPast3Months>
      <remarks>This sale, in addition to the sale on 04/09/2025, occurred in the John E Kinzer Trust account of which John E. Kinzer is a trustee.</remarks>
      <noticeSignature>
        <noticeDate>06/20/2025</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>11/22/2024</planAdoptionDate>
        </planAdoptionDates>
        <signature>/s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for John E. Kinzer</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 3678}]
text: 144
  0001621078
  XXXXXXXX
  LIVE
  0001889956
  OneStream, Inc.
  001-42187
  191 N. CHESTER STREET
  BIRMINGHAM
  MI
  48009
  (248) 650-1490
  Kinzer John
  Director
  Class A
  Fidelity Brokerage Services LLC
  900 Salem Street
  Smithfield
  RI
  02917
  30000
  847932.24
  75399202
  06/20/2025
  NASDAQ
  Class A
  05/31/2019
  Pre-IPO Shares
  Issuer
  N
  30000
  05/31/2019
  Cash
  N
  John E Kinzer Trust
  191 N. Chester Street
  Birmingham
  MI
  48009
  Class A
  04/09/2025
  40000
  811047.35
  This sale, in addition to the sale on 04/09/2025, occurred in the John E Kinzer Trust account of which John E. Kinzer is a trustee.
  06/20/2025
  11/22/2024
  /s/ Jennifer Ruchti, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for John E. Kinzer