Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the use in this Registration Statement on FormS-1 of BlackLine, Inc. of our report dated March 10, 2017 relating to the financial statements, which appears in such Registration Statement. We also consent to the reference to us under the heading “Experts”in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
Los Angeles, California
May 22, 2017
