Exhibit 23.1

Armanino LLP  12657 Alcosta Boulevard Suite 500 San Ramon, CA 94583-4600 925 790 2600      main 925 790 2601      fax
armaninoLLP.com

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the reference to our firm under the caption “Experts” in this Registration Statement on Form S-3 and the related Prospectus for the registration of Momentus Inc. common stock, preferred stock, debt securities, warrants, rights and units, and to the incorporation by reference therein of our audit report dated March 8, 2022 with respect to our audits of the consolidated balance sheets of Momentus Inc. as of December 31, 2021 and 2020, the related statements of operations, stockholders’ equity (deficit), and cash flows for each of the years in the two-year period ended December 31, 2021, and the related notes to the financial statements.

/s/ Armanino^LLP

San Ramon, California

September 1, 2022