l0ng-ai/openidea

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.

Build

pnpm install
pnpm tauri dev

Rust 1.96, Node 22, pnpm and the Tauri prerequisites.

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.}