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Eclipse IDE vs CLion: catalog facts
Eclipse IDE	CLion
Free The open-source application is available without a license fee.	Freemium Free for non-commercial use. Commercial use requires a paid subscription.
Windows, macOS, Linux	Windows, macOS, Linux
Huge plugin marketplace covering languages and domains other IDEs ignore Entirely open source and free for commercial use	Understands CMake and compilation databases rather than guessing at includes Remote and embedded debugging built in
The workspace and perspective model feels dated and confuses newcomers Plugin quality varies widely and conflicts are common	Commercial use requires a paid subscription Indexing large C++ codebases is slow
Downloadable app	Downloadable app
Open source	Closed 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
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

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