The Browser Company is sunsetting its design-forward Arc browser on December 22, 2026, and directing users to Dia, its AI-first browser. The company announced the decision on Thursday, citing the rising cost of keeping a browser secure in the age of AI.

“Keeping a browser secure takes constant, dedicated work that is only increasing in the age of AI,” the company wrote.

“Dia was built from the ground up to meet today’s security standards, so that’s where our engineering and security teams will focus moving forward.”

The wind-down is staged into three parts. As of Thursday, new Arc accounts can no longer be created. On November 23, Arc Search on iOS and Android will lose its AI features, including “Browse for Me.” Users will no longer be able to sign in or sync tabs, though the app will continue functioning as a basic local browser.

On December 22, Arc will stop working entirely on Mac and Windows. Accounts will be deactivated, and personal data will be deleted within 30 days.…