CUSIP No. 03213A 10 4 13G Exhibit 99.1

EXHIBIT A

JOINT FILING STATEMENT

We, the undersigned, hereby express our agreement that the attached statement on Schedule 13G relating to the Class A Common Stock of Amplitude, Inc. is filed on behalf of each of us.

Dated: February 13, 2024
INSTITUTIONAL VENTURE PARTNERS XV, L.P.
INSTITUTIONAL VENTURE PARTNERS XV EXECUTIVE FUND, L.P.
By: Institutional Venture Management XV, LLC
Its: General Partner
By:	/s/ Tracy Hogan
Tracy Hogan, Attorney-in-Fact
INSTITUTIONAL VENTURE MANAGEMENT XV, LLC
By:	/s/ Tracy Hogan
Tracy Hogan, Attorney-in-Fact
/s/ Tracy Hogan
Tracy Hogan, Attorney-in-Fact for Todd C. Chaffee
/s/ Tracy Hogan
Tracy Hogan, Attorney-in-Fact for Norman A. Fogelsong
/s/ Tracy Hogan
Tracy Hogan, Attorney-in-Fact for Stephen J. Harrick
/s/ Tracy Hogan
Tracy Hogan, Attorney-in-Fact for J. Sanford Miller
/s/ Tracy Hogan
Tracy Hogan, Attorney-in-Fact for Dennis B. Phelps
/s/ Tracy Hogan
Tracy Hogan, Attorney-in-Fact for Jules A. Maltz
/s/ Tracy Hogan
Tracy Hogan, Attorney-in-Fact for Somesh Dash
/s/ Tracy Hogan
Tracy Hogan, Attorney-in-Fact for Eric Liaw

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