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Monica vs Merlin: catalog facts
Monica	Merlin
Freemium Free to start, with paid plans listed on the pricing page.	Freemium Free to start, with a paid plan from 19 US dollars.
Windows, macOS, Android, iOS, Web, Browser extension	Android, iOS, Web, Browser extension
Several AI model families in one interface Works in a sidebar on any webpage	Several AI models in one place Page, search and video summaries from the extension
Browser extension covers Chrome and Edge only All processing happens on hosted servers	Closed source hosted service Fuller use requires a paid plan
Downloadable app, Web application, Browser extension	Downloadable app, Web application, Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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