head to head · open source
ComfyUI vs Onyx
ComfyUI has 133,963 GitHub stars, 15,874 forks, 4,894 open issues and last shipped today. Onyx has 32,175 stars, 4,490 forks, 451 open issues and last shipped yesterday. ComfyUI leads on adoption by 316% (133,963 vs 32,175 stars). ComfyUI is written in Python under GPL-3.0; Onyx is written in Python under a custom or non-standard licence. ComfyUI has attracted 12% as many forks as stars, Onyx 14%. ComfyUI was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (ai, python), so they are genuine substitutes rather than adjacent tools.
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 | Onyx | |
|---|---|---|
| GitHub stars | ★ 134K | ★ 32K |
| License | GPL-3.0 | Custom / other |
| Written in | Python | Python |
| Last push | 2026-09-20 | 2026-09-19 |
| Forks | ⑂ 16K | ⑂ 4.5K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ComfyUI if
- You weight community size — 134K 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 Onyx if
- You want the Onyx feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Python
- You evaluated both and Onyx fits your workflow better
About ComfyUI
ComfyUI is a GPL 3.0 licensed Python and PyTorch node graph application, local API, and backend for running diffusion models across image, video, audio, 3D, and text workflows, built for visual professionals who want control over every model, parameter, and output, and for developers who embed those workflows into production pipelines.
read the full ComfyUI overview →
About Onyx
Onyx is an open source AI application layer that gives teams a self hostable chat interface with retrieval augmented generation over their own company data and more than 50 indexing connectors.
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Frequently asked questions
Is ComfyUI or Onyx more popular?
ComfyUI has 133,963 GitHub stars and Onyx has 32,175. ComfyUI has the larger community by that measure.
Are ComfyUI and Onyx free?
Both are open source. ComfyUI is licensed under GPL-3.0, and Onyx has no licence declared in this registry. Both are free to self-host.
What is the difference between ComfyUI and Onyx?
ComfyUI is written in Python and Onyx in Python. 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 Onyx?
Choose ComfyUI if you want the larger community (133,963 stars) or its GPL-3.0 licence terms. Choose Onyx if its feature set, stack or Custom / other licence fits better. Both are self-hostable.