Compare software

Vessel BrowserPerplexity Comet
Freemium

Open source; Vessel Premium costs $5.99 per month with a 7-day trial.

 Freemium

A free tier is available. Full agent features require a Perplexity subscription.

Windows, macOS, Linux Windows, macOS
  • AI actions shown in a real browser window with approval steps
  • MCP control for external agent tools
  • Assistant can act on pages, not only summarise them
  • Early software, not recommended for sensitive accounts
  • Linux is the only mature install target
  • Requires a Perplexity account, and an agent acting on logged-in sites carries real risk
  • Closed source
Downloadable app Downloadable app
Open source Closed source
License: MIT License not stated
Not stated if an account is needed Account needed
Needs internet Not stated if it works offline

Checked October 2, 2026

Checked September 22, 2026

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