Compare software

HARPA AIBrowserOS
Freemium

Free to install, with paid plans for heavier use of hosted models.

 Free

Free and open source.

Browser extension Windows, macOS, Linux
  • Works with many AI providers and local models
  • YouTube, PDF and page summaries in place
  • Built-in AI agents that act on web pages
  • Can use local models instead of a cloud service
  • Mainly a Chrome extension
  • Hosted models send page content to third-party AI providers
  • Agent features are new and still changing quickly
  • Local models need capable hardware to run well
Browser extension Downloadable app
Closed source Open source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Needs internet Not stated if it works offline

Checked September 23, 2026

Checked September 24, 2026

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