The IDE you know, rebuilt in Rust.

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https://github.com/user-attachments/assets/234dd54c-1255-4b3a-b35c-533d78d737c0

OpenIDEA brings the IntelliJ IDEA way of working — its keymap, its tool windows, its search-everything habits — to a native app with a Rust core.

Editor, code insight, debugger, Git, terminal, database and HTTP clients, for 60+ languages. Builds for macOS, Windows and Linux. On Windows, if you'd rather skip the installer, each release also ships a portable zip — unpack it and run openidea.exe.

Benchmark

Opening freqtrade (Python, ~770 files) with warm caches, median of 5 runs:

	OpenIDEA	IntelliJ IDEA 2026.2.3
Window with the project	0.9 s	3.1 s
Ready (CPU settled)	1.1 s	13.2 s
Memory (USS, all processes)	169 MB	2011 MB
CPU time until ready	2.4 s	47.9 s
Idle CPU	4 % of a core	7 % of a core
Quit	0.3 s	5.9 s

A release build of OpenIDEA from main and IDEA with default settings and plugins, on Windows 11, 32-core AMD, 62 GB RAM. IDEA analyses Python more deeply, so "ready" doesn't mean the same work on both sides. Both are measured from the outside, the same way: see perf/compare to run it on your machine and projects.

Plugins

Plugins add actions, completion, quick fixes, tool windows, custom editors, themes, file icons and languages. They run as sandboxed WebAssembly components; themes, icon themes and languages need no code at all.

Install them from Settings › Plugins, or start your own with openidea-plugin new — see Writing OpenIDEA plugins and the official plugins. The plugin API is still a preview.

Community

• Discord — questions, feedback and release news.

• WeChat group — scan to join:

  

Contributors

License

Apache 2.0. Bundled third-party assets are listed in THIRD_PARTY_LICENSES.md.

Arduino sketches (.ino) have C++ syntax highlighting and code intelligence via Arduino Language Server. For completion, signature help, hover and definition navigation, install Arduino IDE 2 and the board's core. Configure the server command and arguments in Settings > Languages & Frameworks > Language Servers, or set tool paths in settings.toml using languages.arduino.cli, languages.arduino.clangd, languages.arduino.languageServer and languages.arduino.cliConfig. OpenIDEA automatically discovers the IDE's Arduino CLI, clangd and Arduino Language Server on Windows, macOS and Linux; board FQBN is read from sketch.yaml or languages.arduino.fqbn in settings.toml.

_{Not affiliated with JetBrains. IntelliJ IDEA is a trademark of JetBrains s.r.o.}