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IntelliJ IDEA vs Eclipse SDK: catalog facts
IntelliJ IDEA	Eclipse SDK
Freemium The Community Edition is free. IntelliJ IDEA Ultimate requires a paid subscription.	Free Free and open source.
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	Includes tools for developing Eclipse plug-ins Java development tools included
Framework support, profiler and database tools are Ultimate features Indexing a large project is slow and memory-hungry	Heavier than lightweight code editors Other Eclipse IDE packages may suit single-language work better
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: EPL-2.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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