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 March 31, 2025 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:
(1)
The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and
(2)
The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.
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     IN8bio, Inc.  | 
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Date:  | 
     May 7, 2025  | 
     By:  | 
     /s/ William Ho  | 
    
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     William Ho  | 
    
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     Chief Executive Officer  | 
    
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Date:  | 
     May 7, 2025  | 
     By:  | 
     /s/ Patrick McCall  | 
    
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     Patrick McCall  | 
    
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     Chief Financial Officer and Secretary  |