What is ComfyUI?
ComfyUI is an image & design tool and completely free. Node-based Stable Diffusion & FLUX powerhouse — total control, zero cost. We rate it 9.1/10 after hands-on testing. Because it is open source (GPL-3.0), you can run it yourself and keep full control of your data.
ComfyUI at a glance
| Category | Image & Design |
|---|---|
| Pricing | Free |
| Free version | ✓ Yes |
| Open source | ✓ GPL-3.0 |
| GitHub stars | ★ 65k |
| Our score | 9.1/10 |
| Partner deal | — |
Why we rate ComfyUI
- Has a genuinely free version — no credit card to start.
- Open source (GPL-3.0) — self-hostable and yours to modify.
- Backed by a large community — 65k GitHub stars.
- One of the highest-scoring tools in its category on our tests.
ComfyUI FAQ
Is ComfyUI free?
Yes. ComfyUI is completely free to use.
Is ComfyUI open source?
Yes — ComfyUI is open source under the GPL-3.0 license and can be self-hosted.
What are the best ComfyUI alternatives?
We track 25 other image & design tools you can compare with ComfyUI in the directory.
How do we rate ComfyUI?
We score ComfyUI 9.1 out of 10 after hands-on testing, weighing the free tier, output quality, ease of use and value. Scores are decided before any partnership and never bought.
