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ComfyUI vs Stable Diffusion web UI: catalog facts
ComfyUI	Stable Diffusion web UI
Free The open-source software is available without a license fee. Hosting, hardware and…	Free The open-source software is available without a license fee. Hosting, hardware and…
Windows, macOS, Linux	Windows, macOS, Linux
Connects models and processing steps in reusable graphs.	Includes inpainting, outpainting and configurable generation settings.
Local models need suitable hardware and separate model downloads.	Requires Python, model files and suitable processing hardware.
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: AGPL-3.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.