Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-220469 and 333-83206) of White Mountains Insurance Group, Ltd. of our report dated March 15, 2021relating to the financial statements and financial statement schedule of MediaAlpha, Inc., which appears in MediaAlpha, Inc.'s Annual Report on Form 10-K for the year ended December 31, 2020.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

March 29, 2021