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IntelliJ IDEA vs Eclipse IDE: catalog facts
IntelliJ IDEA	Eclipse IDE
Freemium The Community Edition is free. IntelliJ IDEA Ultimate requires a paid subscription.	Free The open-source application is available without a license fee.
Windows, macOS, Linux	Windows, macOS, Linux
Refactorings and inspections that understand the whole project, not just the file Community Edition is free and open source	Huge plugin marketplace covering languages and domains other IDEs ignore Entirely open source and free for commercial use
Framework support, profiler and database tools are Ultimate features Indexing a large project is slow and memory-hungry	The workspace and perspective model feels dated and confuses newcomers Plugin quality varies widely and conflicts are common
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	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.