ComfyUI: node-based image generation workflows
ComfyUI is a modular interface, API and backend for diffusion models, with workflows assembled as reusable graphs of connected nodes.
Free open-source software under the GPL-3.0 licence
How I use ComfyUI
I run ComfyUI on demand on my Fedora GPU workstation for node-based image generation workflows.
What makes it different?
A graph of reusable nodes exposes the steps in a diffusion workflow, with a local interface and API.
Competitors
- AUTOMATIC1111: A panel-based Stable Diffusion web interface
- InvokeAI: Creative tooling around image generation workflows
Product source checked 2026-09-22.
Who it is for
Repeatable, node-based image generation and processing workflows.
Who can claim it?
The source and installation routes are publicly available. Suitable models and enough local or hosted computing capacity are required.
What the free software includes, and what costs extra
Models can require substantial storage and GPU memory. Model licences and usage conditions are separate from the ComfyUI software licence.
Billing and renewal
There is no recurring software charge; models, hardware and hosted computing remain separate.
- Tax basis
- Not applicable to the free software or plan
- Card required
- Provider’s signup terms
- Expiry
- No fixed availability end date is listed.
- Public research date
- 22 Sept 2026
- Source checked
- 22 Sept 2026