head to head · open source
ComfyUI vs vellum-assistant
ComfyUI has 144,907 GitHub stars, 17,244 forks, 4,894 open issues and last shipped yesterday. vellum-assistant has 1,474 stars, 230 forks, 179 open issues and last shipped yesterday. ComfyUI leads on adoption by 9,731% (144,907 vs 1,474 stars). ComfyUI is written in Python under GPL-3.0; vellum-assistant is written in TypeScript under MIT. ComfyUI has attracted 12% as many forks as stars, vellum-assistant 16%. 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 | vellum-assistant | |
|---|---|---|
| GitHub stars | ★ 145K | ★ 1.5K |
| License | GPL-3.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-11-04 | 2026-11-04 |
| Forks | ⑂ 17K | ⑂ 230 |
| 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 vellum-assistant if
- You want the vellum-assistant feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and vellum-assistant 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 vellum-assistant
A personal AI assistant that evolves with you. 8 different types of memory (episodic, semantic, procedural, emotional, prospective, behavioral, narrative, shared) make it truly yours. It learns how you work, remembers what matters, and takes action across your apps. What It Does If you've set up a Personal AI on OpenClaw, Hermes Agent, or Claude Code, you know how long it takes, and how many times you have to hatch a new one to get it right. Vellum gets you the result you're looking for out of the box, one download away. Get Started 1. Sign up or download the app The desktop app is available for macOS and…
read the full vellum-assistant overview →
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Frequently asked questions
Is ComfyUI or vellum-assistant more popular?
ComfyUI has 144,907 GitHub stars and vellum-assistant has 1,474. ComfyUI has the larger community by that measure.
Are ComfyUI and vellum-assistant free?
Both are open source. ComfyUI is licensed under GPL-3.0 and vellum-assistant under MIT. Neither carries a licence fee.
What is the difference between ComfyUI and vellum-assistant?
ComfyUI is written in Python and vellum-assistant in TypeScript. 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 vellum-assistant?
Choose ComfyUI if you want the larger community (144,907 stars) or its GPL-3.0 licence terms. Choose vellum-assistant if its feature set, stack or MIT licence fits better. Both are self-hostable.