Exhibit 16.1

June 7, 2024

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Commissioners:

We have read the statements made by System1, Inc. (copy attached), which we understand will be filed with the Securities and Exchange Commission, pursuant to Item 4.01 of Form 8-K of System1, Inc. dated June 4, 2024. We agree with the statements concerning our Firm contained therein.

Very truly yours,

/s/PricewaterhouseCoopers LLP

Los Angeles, California