Compare software

Perplexity CometVessel Browser
Freemium

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

 Freemium

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

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

Checked September 22, 2026

Checked October 2, 2026

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