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We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-214309, 333-217985, 333-223528, 333-226818, 333-229968, 333-236715, and 333-253522) and Form S-3 (No. 333-221500) of BlackLine, Inc. of our report dated February 25, 2022 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.