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.

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.

License

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

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