Arc Browser Shuts Down December 22 as Dia Takes Over
The Browser Company will shut Arc on December 22, 2026, move users to AI-first Dia, transfer key data, and delete account data within 30 days of deactivation.
Summary
On October 22, 2026, The Browser Company said it will close Arc and focus engineering and security resources on AI-first Dia, citing rising browser security costs in the AI era. New Arc accounts are now blocked. On November 23, Arc Search on iOS and Android loses Browse for Me and other AI features, sign-in and tab syncing, but remains a basic local browser. On December 22, Arc stops working on Mac and Windows, accounts are deactivated, personal data is deleted within 30 days, and Arc Search leaves the Google Play Store.
The company says Dia, built for current security standards, beats Arc in speed, stability and security benchmarks. Passwords, bookmarks, extensions and history will transfer; Profiles replace Spaces, vertical tabs remain optional, and Folders become Pinned Tab Groups. Existing Arc features stay free and AI remains optional. Social media reaction was largely disappointed, with renewed open source requests, but CEO Josh Miller says Arc and Dia share the proprietary Arc Development Kit, or ADK, which remains core intellectual property. Active Arc development ended in 2025 after its complexity and “novelty tax” constrained mainstream adoption as a Chrome alternative. Atlassian acquired The Browser Company for $610 million in 2025.
Positives
- Passwords, bookmarks, extensions and browsing history will transfer from Arc to Dia.
- Dia retains Profiles, optional vertical tabs and Pinned Tab Groups as equivalents to Arc’s Spaces, sidebar and Folders.
- Arc features will remain free in Dia, while AI use will be optional.
- The Browser Company says Dia surpasses Arc in speed, stability and security benchmarks.
Risks & concerns
- Arc will stop working entirely on Mac and Windows on December 22, 2026.
- Arc Search loses AI features, sign-in and tab syncing on November 23, leaving only basic local browsing.
- Deactivated Arc accounts will have their personal data deleted within 30 days of the shutdown.
- Social media users reacted largely with disappointment and renewed demands for an open source release.
- Arc’s reliance on the proprietary ADK prevents meaningful open sourcing without exposing Dia’s core intellectual property.