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Exhibit 23.1

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CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

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We consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-266133 and No. 333-258524) of our report dated March 11, 2025, with respect to the consolidated financial statements of MaxCyte, Inc. included in this Annual Report on Form 10-K of MaxCyte, Inc. for the year ended December 31, 2024.

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/s/ CohnReznick LLP

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Tysons, Virginia

March 11, 2025

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