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IntelliJ IDEA vs Language Support for Java(TM) by Red Hat: catalog facts
IntelliJ IDEA	Language Support for Java(TM) by Red Hat
Freemium The Community Edition is free. IntelliJ IDEA Ultimate requires a paid subscription.	Free Free to install from the Visual Studio Marketplace.
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	Code completion, linting, formatting and refactoring for Java Maven and Gradle projects recognised automatically
Framework support, profiler and database tools are Ultimate features Indexing a large project is slow and memory-hungry	Only works inside Visual Studio Code Other platforms need a separately installed JDK 25 or newer
Downloadable app	Downloadable app
Open source	Closed source
License: Apache-2.0	License not stated
Not stated if an account is needed	No account 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 October 1, 2026

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