head to head · open source
ComfyUI vs Jan
ComfyUI has 144,907 GitHub stars, 17,244 forks, 4,894 open issues and last shipped yesterday. Jan has 45,409 stars, 3,145 forks, 521 open issues and last shipped yesterday. ComfyUI leads on adoption by 219% (144,907 vs 45,409 stars). ComfyUI is written in Python under GPL-3.0; Jan is written in Rust under a custom or non-standard licence. ComfyUI has attracted 12% as many forks as stars, Jan 7%. Jan was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| ComfyUI | Jan | |
|---|---|---|
| GitHub stars | ★ 145K | ★ 45K |
| License | GPL-3.0 | Custom / other |
| Written in | Python | Rust |
| Last push | 2026-11-04 | 2026-11-04 |
| Forks | ⑂ 17K | ⑂ 3.1K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ComfyUI if
- You weight community size — 145K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick Jan if
- You want the Jan feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Rust
- You evaluated both and Jan fits your workflow better
About ComfyUI
ComfyUI The most powerful and modular AI engine for content creation. [![Website][website shield]][website url] [![Dynamic JSON Badge][discord shield]][discord url] [![Twitter][twitter shield]][twitter url] [![Matrix][matrix shield]][matrix url] [![][github release shield]][github release link] [![][github release date shield]][github release link] [![][github downloads shield]][github downloads link] [![][github downloads latest shield]][github downloads link] [matrix shield]: [matrix url]: [website shield]: [website url]: [discord shield]: [discord url]: [twitter shield]: [twitter url]: [github release…
read the full ComfyUI overview →
About Jan
Jan Open source ChatGPT replacement English · 中文 · 日本語 Getting Started Community Changelog Bug reports Jan is bringing the best of open source AI in an easy to use product. Download and run LLMs with full control and privacy . Installation The easiest way to get started is by downloading one of the following versions for your respective operating system: Platform Download Windows jan.exe macOS jan.dmg Linux (deb) jan.deb Linux (AppImage) jan.AppImage Linux (Arm64) How to Download from jan.ai or GitHub Releases. Features Local AI Models : Download and run LLMs (Llama, Gemma, Qwen, GPT oss etc.) from HuggingFace…
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Frequently asked questions
Is ComfyUI or Jan more popular?
ComfyUI has 144,907 GitHub stars and Jan has 45,409. ComfyUI has the larger community by that measure.
Are ComfyUI and Jan free?
Both are open source. ComfyUI is licensed under GPL-3.0, and Jan has no licence declared in this registry. Both are free to self-host.
What is the difference between ComfyUI and Jan?
ComfyUI is written in Python and Jan in Rust. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, ComfyUI or Jan?
Choose ComfyUI if you want the larger community (144,907 stars) or its GPL-3.0 licence terms. Choose Jan if its feature set, stack or Custom / other licence fits better. Both are self-hostable.