Dia is the AI browser from The Browser Company, the team behind Arc. It entered beta in June 2025, opened to all Mac users in October 2025, and has since arrived on Windows. You can chat with your open tabs, get a Morning Brief that summarizes your calendar, inbox and key links before the workday, pull context from apps such as Slack, Notion and Teams into reports, and jump to live work such as GitHub pull requests from the tab bar. Profiles and Tab Groups carry over Arc’s organization, the AI features are optional, and the browser is free to download and use.

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