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>0001851605</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>Hirsch Brian</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Affiliate</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Merrill</name>
          <address>
            <com:street1>555 California Street</com:street1>
            <com:street2>Floor 18</com:street2>
            <com:city>San Francisco</com:city>
            <com:stateOrCountry>CA</com:stateOrCountry>
            <com:zipCode>94104</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>61666</noOfUnitsSold>
        <aggregateMarketValue>1126021.16</aggregateMarketValue>
        <noOfUnitsOutstanding>1521759</noOfUnitsOutstanding>
        <approxSaleDate>08/23/2024</approxSaleDate>
        <securitiesExchangeName>NASDAQ</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <acquiredDate>01/17/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Private Placement</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Issuer</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>61666</amountOfSecuritiesAcquired>
        <paymentDate>01/17/2018</paymentDate>
        <natureOfPayment>Cash</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Brian Hirsch</name>
          <address>
            <com:street1>99 Hudson Street, Floor 15</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10013</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <saleDate>05/29/2024</saleDate>
        <amountOfSecuritiesSold>8221</amountOfSecuritiesSold>
        <grossProceeds>150325.66</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Brian Hirsch</name>
          <address>
            <com:street1>99 Hudson Street, Floor 15</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10013</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <saleDate>05/31/2024</saleDate>
        <amountOfSecuritiesSold>100</amountOfSecuritiesSold>
        <grossProceeds>1825.00</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Brian Hirsch</name>
          <address>
            <com:street1>99 Hudson, Floor 15</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10013</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <saleDate>06/06/2024</saleDate>
        <amountOfSecuritiesSold>342</amountOfSecuritiesSold>
        <grossProceeds>6167.85</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Brian Hirsch</name>
          <address>
            <com:street1>99 Hudson Street, Floor 15</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10013</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <saleDate>06/07/2024</saleDate>
        <amountOfSecuritiesSold>14909</amountOfSecuritiesSold>
        <grossProceeds>268649.59</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Brian Hirsch</name>
          <address>
            <com:street1>99 Hudson Street, Floor 15</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10013</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <saleDate>06/10/2024</saleDate>
        <amountOfSecuritiesSold>57211</amountOfSecuritiesSold>
        <grossProceeds>1048485.05</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>Brian Hirsch</name>
          <address>
            <com:street1>99 Hudson Street, Floor 15,</com:street1>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10013</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Class A</securitiesClassTitle>
        <saleDate>06/11/2024</saleDate>
        <amountOfSecuritiesSold>22958</amountOfSecuritiesSold>
        <grossProceeds>416180.14</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>08/23/2024</noticeDate>
        <signature>Brian Hirsch</signature>
      </noticeSignature>
    </formData>
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metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 6262}]
text: 144
  0001851605
  XXXXXXXX
  LIVE
  0001637873
  ACV Auctions Inc.
  001-40256
  640 ELLICOTT STREET
  BUFFALO
  NY
  14203
  585-317-0406
  Hirsch Brian
  Affiliate
  Class A
  Merrill
  555 California Street
  Floor 18
  San Francisco
  CA
  94104
  61666
  1126021.16
  1521759
  08/23/2024
  NASDAQ
  Class A
  01/17/2018
  Private Placement
  Issuer
  N
  61666
  01/17/2018
  Cash
  N
  Brian Hirsch
  99 Hudson Street, Floor 15
  New York
  NY
  10013
  Class A
  05/29/2024
  8221
  150325.66
  Brian Hirsch
  99 Hudson Street, Floor 15
  New York
  NY
  10013
  Class A
  05/31/2024
  100
  1825.00
  Brian Hirsch
  99 Hudson, Floor 15
  New York
  NY
  10013
  Class A
  06/06/2024
  342
  6167.85
  Brian Hirsch
  99 Hudson Street, Floor 15
  New York
  NY
  10013
  Class A
  06/07/2024
  14909
  268649.59
  Brian Hirsch
  99 Hudson Street, Floor 15
  New York
  NY
  10013
  Class A
  06/10/2024
  57211
  1048485.05
  Brian Hirsch
  99 Hudson Street, Floor 15,
  New York
  NY
  10013
  Class A
  06/11/2024
  22958
  416180.14
  08/23/2024
  Brian Hirsch