Compare software

Eclipse IDETheia IDE
Free

The open-source application is available without a license fee.

 Free

Free and open source.

Windows, macOS, Linux Windows, macOS, Linux, Web
  • Huge plugin marketplace covering languages and domains other IDEs ignore
  • Entirely open source and free for commercial use
  • Runs VS Code extensions from Open VSX
  • Available on desktop and online
  • The workspace and perspective model feels dated and confuses newcomers
  • Plugin quality varies widely and conflicts are common
  • Uses Open VSX rather than the Microsoft extension marketplace
  • Smaller user community than VS Code
Downloadable app Downloadable app, Web application
Open source Open source
License: EPL-2.0 License not stated
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 22, 2026

Checked September 23, 2026

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