# OpenIDEA: The IDE you know, rebuilt in Rust

> Source: <https://github.com/l0ng-ai/openidea>
> Published: 2026-11-01 09:15:26+00:00

The IDE you know, rebuilt in Rust.

[**Download**](https://github.com/l0ng-ai/openidea/releases/latest)
   · 
  [Benchmark](#benchmark)
   · 
  [Build](#build)
   · 
  [Discord](https://discord.gg/2Zy4yn7gP)

## 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.

Opening [freqtrade](https://github.com/freqtrade/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`](https://github.com/l0ng-ai/openidea/blob/main/perf/compare) to run it on your machine and projects.

```
pnpm install
pnpm tauri dev
```

Rust 1.96, Node 22, pnpm and the [Tauri prerequisites](https://v2.tauri.app/start/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
```

[Apache 2.0](https://github.com/l0ng-ai/openidea/blob/main/LICENSE). Bundled third-party assets are listed in [`THIRD_PARTY_LICENSES.md`](https://github.com/l0ng-ai/openidea/blob/main/THIRD_PARTY_LICENSES.md).

<sub>Not affiliated with JetBrains. IntelliJ IDEA is a trademark of JetBrains s.r.o.</sub>