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>0001772240</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001637873</issuerCik>
        <issuerName>ACV Auctions Inc.</issuerName>
        <secFileNumber>001-40256</secFileNumber>
        <issuerAddress>
          <com:street1>640 ELLICOTT STREET</com:street1>
          <com:city>BUFFALO</com:city>
          <com:stateOrCountry>NY</com:stateOrCountry>
          <com:zipCode>14203</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>585-317-0406</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>15 Angels III LLC</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Class A Common</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Merrill Lynch</name>
          <address>
            <com:street1>555 California St</com:street1>
            <com:street2>18th Floor</com:street2>
            <com:city>San Francisco</com:city>
            <com:stateOrCountry>CA</com:stateOrCountry>
            <com:zipCode>94104</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>4557</noOfUnitsSold>
        <aggregateMarketValue>84851.34</aggregateMarketValue>
        <noOfUnitsOutstanding>152175941</noOfUnitsOutstanding>
        <approxSaleDate>08/20/2024</approxSaleDate>
        <securitiesExchangeName>Nasdaq</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Class A Common</securitiesClassTitle>
        <acquiredDate>08/12/2016</acquiredDate>
        <natureOfAcquisitionTransaction>Private Placement</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>4557</amountOfSecuritiesAcquired>
        <paymentDate>08/12/2016</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <remarks>The shares sold within the last 3 months are within the attached exhibit.</remarks>
      <noticeSignature>
        <noticeDate>08/20/2024</noticeDate>
        <signature>Sandra Grippo</signature>
      </noticeSignature>
    </formData>
  
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 2848}]
text: 144
  0001772240
  XXXXXXXX
  LIVE
  0001637873
  ACV Auctions Inc.
  001-40256
  640 ELLICOTT STREET
  BUFFALO
  NY
  14203
  585-317-0406
  15 Angels III LLC
  Director
  Class A Common
  Merrill Lynch
  555 California St
  18th Floor
  San Francisco
  CA
  94104
  4557
  84851.34
  152175941
  08/20/2024
  Nasdaq
  Class A Common
  08/12/2016
  Private Placement
  Issuer
  N
  4557
  08/12/2016
  Cash
  Y
  The shares sold within the last 3 months are within the attached exhibit.
  08/20/2024
  Sandra Grippo