Consent of Independent Registered Public Accounting Firm
We hereby consent to the incorporation by reference in this Registration Statement on our reports dated February 19, 2026, relating to the consolidated financial statements and the effectiveness of internal control over financial reporting, of Appian Corporation (the Company), appearing in the Company’s Annual Report on Form 10-K for the year ended December 31, 2025.
/s/ BDO USA, P.C.
McLean, Virginia
June 18, 2026