The Browser Company will sunset Arc browser on December 22 to focus entirely on AI-native Dia
The cult-favorite desktop browser stops working in December as the Atlassian-backed startup cites mounting maintenance costs and pivots to autonomous browsing agents.
Technology news
The Browser Company announced on Thursday that it is officially sunsetting its acclaimed, design-centric Arc desktop browser on December 22, 2026, directing its entire engineering organization toward Dia, its newly launched artificial intelligence-first web browser. The wind-down terminates active development on a product that captured immense cultural enthusiasm among software engineers and designers but struggled to transcend its niche status to challenge Google Chrome in the mainstream enterprise market.
The sunset process is structured across three deliberate phases. Effective immediately, new user account creation on Arc has been disabled. On November 23, the Arc Search mobile application on iOS and Android will be stripped of its signature generative AI features—including "Browse for Me"—and tab synchronization will cease. On December 22, Arc will stop functioning entirely on macOS and Windows, user accounts will be permanently deactivated, and associated telemetry and personal profile data will be purged within 30 days.
Addressing passionate community requests to release Arc under an open-source license, CEO Josh Miller explained that the application is architecturally bound to the proprietary Arc Development Kit (ADK)—the foundational Swift and web rendering engine that now powers Dia. Releasing Arc’s source code would inevitably compromise the intellectual property underpinning Dia, which The Browser Company—acquired by collaboration software giant Atlassian in 2025 for $610 million—views as its core commercial asset.
To mitigate user friction during the migration, The Browser Company has engineered seamless data portability into Dia, enabling users to import bookmarks, stored passwords, extensions, and browsing history with a single click. Dia preserves Arc’s celebrated vertical sidebar layout and reimagines Spaces as "Profiles" and Folders as "Pinned Tab Groups," pairing familiar navigational paradigms with autonomous agent capabilities that can execute multi-step web research on behalf of users.