Exhibit 32.1
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Quarterly Report on Form 10-Q of IN8bio, Inc. (the “Company”) for the period ended September 30, 2024 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:
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    IN8bio, Inc.  | 
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Date:  | 
    November 12, 2024  | 
    By:  | 
    /s/ William Ho  | 
   
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    William Ho  | 
   
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    Chief Executive Officer  | 
   
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Date:  | 
    November 12, 2024  | 
    By:  | 
    /s/ Patrick McCall  | 
   
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    Patrick McCall  | 
   
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    Chief Financial Officer and Secretary  |