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