Can I use IntelliJ IDEA Community Edition for developing commercial proprietary software?

Yes, you can use IntelliJ IDEA Community Edition to build proprietary and commercial software.

The codebase and most bundled plugins are open source under the Apache-2.0 license. For details, see the full list of third-party software and licenses.

However, standard distributions also include some proprietary JetBrains plugins to enable out-of-the-box integration with other JetBrains products. If you’re planning to create derivative products or commercialize the IntelliJ IDEA Community Edition, make sure to review the license terms for any bundled proprietary plugins and the full JetBrains Community Edition Terms.