Arc browser sunsets December 22 as The Browser Company doubles down on Dia

Arc is closing down

The Browser Company will stop its Arc browser on December 22, 2026. It wants users to switch to Dia, its AI-first browser. The company says keeping a browser safe now takes steady work, and that work is growing because of AI. It says Dia was built to meet today's security needs, so its engineers will focus there.

Key dates and facts

• Now: New Arc accounts can no longer be made.
• November 23: Arc Search on iOS and Android loses its AI features, such as "Browse for Me." Users can no longer sign in or sync tabs, but the app still works as a basic local browser.
• December 22: Arc stops working on Mac and Windows. Accounts are shut off, and personal data is deleted within 30 days.
• Arc Search will also be removed from the Google Play Store.
• The Browser Company was bought by Atlassian for $610 million in 2025.

Why Arc is not being made open source

Many users online were upset and asked for Arc to be made open source, which means sharing its code for anyone to use. CEO Josh Miller has said this is not simple. Arc runs on a private internal toolkit called ADK, which is also the core engine of Dia. Sharing Arc would mean giving away Dia's core technology, so the company says it will not do that.

What moves to Dia

• Profiles in Dia work like Arc's Spaces, so users can switch between work and personal areas.
• Arc's vertical tabs are still available as an optional sidebar.
• Folders are now called Pinned Tab Groups.
• Passwords, bookmarks, extensions, and history move over.
• Arc features stay free in Dia, and AI is optional.

Why this matters

Arc had a loyal group of fans, but it never became a major rival to Google Chrome. The company stopped adding new features in 2025 and now ends the product. Its move shows how the cost of keeping browsers secure is rising in the AI era, and it puts Dia at the center of the company's future.