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Phi Browser vs Perplexity Comet: catalog facts
Phi Browser	Perplexity Comet
Free A free download; the homepage mentions no paid plans.	Freemium A free tier is available. Full agent features require a Perplexity subscription.
macOS	Windows, macOS
Native macOS interface on the Chromium engine Built-in AI assistant with persistent memory	Assistant can act on pages, not only summarise them
Apple Silicon Macs with macOS 14 or newer only Proactive AI features may not suit users who prefer a plain browser	Requires a Perplexity account, and an agent acting on logged-in sites carries real risk Closed source
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

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