Exhibit 23.1
Consent of Independent Registered Public Accounting Firm
Appian Corporation
Reston, Virginia
We hereby consent to the incorporation by reference in the Prospectus constituting a part of this Registration Statement on Form S-8 of our report, dated February 17, 2017, relating to the consolidated financial statements of Appian Corporation which is contained in Amendment No. 3 to Appian Corporation’s Registration Statement on Form S-1 filed with the Securities and Exchange Commission on May 12, 2017.
/s/ BDO USA, LLP
McLean, Virginia
May 30, 2017
