Compare software

WebLLM ChatJan
Free

Free to use in the browser.

 Free

Free and open source. Using a third-party cloud model through Jan costs whatever that…

Web Windows, macOS, Linux
  • Runs models locally in the browser with no install
  • Conversations are processed without a server
  • Runs fully offline on your own computer when you want it to
  • Same interface for local models and for OpenAI, Anthropic, Google, Mistral and others
  • Requires a browser and GPU with WebGPU support
  • Models must be downloaded before first use
  • Still pre-1.0 and moving fast; features appear and change between releases
  • Adding a cloud provider means putting that provider’s API key into the app
Web application Downloadable app
Closed source Open source
License not stated License: Apache-2.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 1, 2026

Checked September 20, 2026

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