GitHub - l0ng-ai/openidea: The IDE you know, rebuilt in Rust. IntelliJ IDEA–style keymap, tool windows and search-everywhere in a fast native app: editor, code insight, debugger, Git, terminal, database and HTTP clients for 60+ languages.

The IDE you know, rebuilt in Rust. Download · Benchmark · Build · Discord openidea-promo.mp4 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.

Native notebook execution tests are opt-in and need two distinct Python environments with ipykernel installed: OPENIDEA_TEST_PYTHON=/first/env/bin/python \ OPENIDEA_TEST_PYTHON_SECOND=/second/env/bin/python \ cargo test -p ide-notebook --test kernel_runtime -- --ignored --test-threads=1 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.