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Brave Leo vs Monica: catalog facts
Brave Leo	Monica
Free Built into the Brave browser, which is free to download.	Freemium Free to start, with paid plans listed on the pricing page.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Android, iOS, Web, Browser extension
Works on the page you are reading without copying text No account needed, and chats are not kept for training	Several AI model families in one interface Works in a sidebar on any webpage
Only available inside the Brave browser	Browser extension covers Chrome and Edge only All processing happens on hosted servers
Downloadable app	Downloadable app, Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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