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Dia vs Phi Browser: catalog facts
Dia	Phi Browser
Freemium A free tier is available. Heavier use requires a paid plan.	Free A free download; the homepage mentions no paid plans.
macOS	macOS
Assistant reads your open tabs, so questions do not need copy and paste	Native macOS interface on the Chromium engine Built-in AI assistant with persistent memory
macOS only and requires an account The assistant sends page content to a remote service, which has privacy implications	Apple Silicon Macs with macOS 14 or newer only Proactive AI features may not suit users who prefer a plain browser
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.