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Theia IDEAtheos
Free

Free and open source.

 Free

Free and open source.

Windows, macOS, Linux, Web Web, Self-hosted
  • Runs VS Code extensions from Open VSX
  • Available on desktop and online
  • Runs on a basic PHP and Apache server with no database
  • Multi-user with real-time collaborative editing
  • Uses Open VSX rather than the Microsoft extension marketplace
  • Smaller user community than VS Code
  • Mainly developed and tested on a Debian LAMP stack
  • Much lighter feature set than desktop IDEs
Downloadable app, Web application Self-hosted
Open source Open source
License not stated License: MIT
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked October 2, 2026

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