The Rubicon Project, Inc. S-4

Exhibit 23.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on Form S-4 of The Rubicon Project, Inc. of our report dated March 14, 2018 relating to the financial statements, which appears in The Rubicon Project, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2018. We also consent to the reference to us under the heading “Experts” in such Registration Statement.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP
Los Angeles, California
January 30, 2020