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Theia IDE vs Eclipse Che: catalog facts
Theia IDE	Eclipse Che
Free Free and open source.	Free Free and open source to self-host; an online trial is hosted by Red Hat.
Windows, macOS, Linux, Web	Web, Self-hosted
Runs VS Code extensions from Open VSX Available on desktop and online	Only a browser is needed to start coding Workspaces defined in versioned Devfiles
Uses Open VSX rather than the Microsoft extension marketplace Smaller user community than VS Code	Requires a Kubernetes cluster to self-host More infrastructure than a local editor for individual use
Downloadable app, Web application	Self-hosted, Hosted service
Open source	Open source
License not stated	License: EPL-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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