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HARPA AI vs Monica: catalog facts
HARPA AI	Monica
Freemium Free to install, with paid plans for heavier use of hosted models.	Freemium Free to start, with paid plans listed on the pricing page.
Browser extension	Windows, macOS, Android, iOS, Web, Browser extension
Works with many AI providers and local models YouTube, PDF and page summaries in place	Several AI model families in one interface Works in a sidebar on any webpage
Mainly a Chrome extension Hosted models send page content to third-party AI providers	Browser extension covers Chrome and Edge only All processing happens on hosted servers
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.