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VSCodium vs IntelliJ IDEA: catalog facts
VSCodium	IntelliJ IDEA
Free Free and open source under the MIT licence.	Freemium The Community Edition is free. IntelliJ IDEA Ultimate requires a paid subscription.
Windows, macOS, Linux	Windows, macOS, Linux
The same editor as VS Code, built from the same MIT-licensed source without Microsoft branding Telemetry is disabled in the default configuration	Refactorings and inspections that understand the whole project, not just the file Community Edition is free and open source
Extensions come from Open VSX, so a few marketplace-only extensions are missing Microsoft’s proprietary extensions, including the C# debugger and Remote Development, are not licensed for it	Framework support, profiler and database tools are Ultimate features Indexing a large project is slow and memory-hungry
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: Apache-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 22, 2026

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