The Browser Company to Sunset Arc Browser on December 22, Focus Shifts to AI-First Dia

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The Browser Company announced it will discontinue the Arc browser by December 22, 2026, directing users to its AI-first successor Dia due to rising security maintenance costs and improved features.

The Browser Company, known for its innovative browser designs, has revealed plans to retire its Arc browser on December 22, 2026. The decision marks a strategic pivot toward its newer AI-first browser, Dia, which was developed with modern security standards and enhanced performance in mind. This announcement was made on October 22, 2026, highlighting the escalating challenges and expenses involved in maintaining a secure browser environment, especially in an increasingly AI-integrated landscape.

Arc, launched in 2025, gained a committed user base appreciative of its distinctive interface and functionality. However, despite its enthusiastic following, Arc did not achieve the widespread adoption envisioned by its creators. With the acquisition of The Browser Company by Atlassian for $610 million in 2025, the focus shifted toward building on the innovative groundwork laid by Arc while adapting to evolving security needs and user expectations.

The phase-out process for Arc is structured in three stages. Starting immediately, new Arc user registrations are disabled. On November 23, the AI-powered features of Arc Search on iOS and Android, including the popular 'Browse for Me' tool, will be discontinued. Users will no longer be able to sign in or sync tabs, although the app will continue to operate locally without these enhancements. The complete termination of Arc’s functionality on Mac and Windows platforms will occur on December 22, concurrent with the deactivation of user accounts and the deletion of personal data within 30 days. Additionally, Arc Search will be removed from the Google Play Store.

The Browser Company emphasizes that Dia currently outperforms Arc in speed, stability, and security, making it the natural evolution for their browser technology. Dia preserves many of Arc’s hallmark features: users can switch between work and personal environments through 'Profiles' (formerly 'Spaces'), maintain the vertical tab layout as an optional sidebar, and access ‘Pinned Tab Groups’ (previously called Folders). Important user data such as passwords, bookmarks, extensions, and browsing history will transfer seamlessly to Dia, ensuring a smooth transition. Core Arc functionalities remain free in Dia, with AI features offered optionally.

Some users expressed disappointment on social media, with calls for Arc’s codebase to be made open source. However, CEO Josh Miller clarified that Arc was built upon the proprietary Arc Development Kit (ADK), which also serves as the foundation for Dia. Open-sourcing Arc would entail releasing ADK, which is central to the company's intellectual property and strategic value. This restriction explains the company's stance on open-sourcing.

This conclusion of Arc’s lifecycle closes an important chapter for The Browser Company, which intends to concentrate its engineering and security efforts on Dia. The move reflects broader industry trends prioritizing security and AI functionality while balancing user experience and business considerations.