head to head · open source
ComfyUI vs Fullmoon
ComfyUI has 133,963 GitHub stars, 15,874 forks, 4,894 open issues and last shipped today. Fullmoon has 2,266 stars, 220 forks, 45 open issues and last shipped 1.4 years ago. ComfyUI leads on adoption by 5,812% (133,963 vs 2,266 stars). ComfyUI is written in Python under GPL-3.0; Fullmoon is written in Swift under MIT. ComfyUI has attracted 12% as many forks as stars, Fullmoon 10%. ComfyUI 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 | Fullmoon | |
|---|---|---|
| GitHub stars | ★ 134K | ★ 2.3K |
| License | GPL-3.0 | MIT |
| Written in | Python | Swift |
| Last push | 2026-09-20 | 2025-05-05 |
| Forks | ⑂ 16K | ⑂ 220 |
| 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 Fullmoon if
- You want the Fullmoon feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Swift
- You evaluated both and Fullmoon 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 Fullmoon
Fullmoon is an iOS application for chatting with local large language models, built in Swift and released under the MIT license. It is optimized for Apple silicon and runs across iPhone, iPad, and Mac, with chat history stored locally on the device and a customizable interface. The project lives in the Apple ecosystem and depends on MLX Swift, Apple's array framework for machine learning research on Apple silicon.
read the full Fullmoon overview →
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Frequently asked questions
Is ComfyUI or Fullmoon more popular?
ComfyUI has 133,963 GitHub stars and Fullmoon has 2,266. ComfyUI has the larger community by that measure.
Are ComfyUI and Fullmoon free?
Both are open source. ComfyUI is licensed under GPL-3.0 and Fullmoon under MIT. Neither carries a licence fee.
What is the difference between ComfyUI and Fullmoon?
ComfyUI is written in Python and Fullmoon in Swift. 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 Fullmoon?
Choose ComfyUI if you want the larger community (133,963 stars) or its GPL-3.0 licence terms. Choose Fullmoon if its feature set, stack or MIT licence fits better. Both are self-hostable.