Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
BTRS Holdings Inc.
Lawrenceville, New Jersey
We hereby consent to the incorporation by reference in this Post-Effective Amendment No.1 to Form S-1 on Form S-3 Registration Statement
(Registration No. 333-252698) of our reports dated March 9, 2022, relating to the consolidated financial statements and the
effectiveness of BTRS Holdings Inc.’s internal control over financial reporting appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021.
We also consent to the reference to us under the caption “Experts” in the Registration Statement.
/s/ BDO USA, LLP
Woodbridge, New Jersey
May 18, 2022