Arc Browser Frozen Under Atlassian as Rivals SigmaOS and Comet Vie for Users

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Arc, the popular workspace-style browser, has stopped receiving feature development since its team shifted focus to Dia after Atlassian's 2025 acquisition for $610 million. It still receives security patches on Mac and Windows, with its latest macOS build released in June 2026. Competitors have moved in different directions: SigmaOS now charges for features Arc once offered free, while Perplexity's Comet dropped its $200 monthly price for a free tier and expanded across platforms. The article advises new users against building workflows around Arc, while current users can keep using it but should plan a migration. Dia, which launched publicly on macOS in October 2025, is aimed at enterprise teams rather than Arc's power-user base.

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