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ComfyUI vs NMKD Stable Diffusion GUI: catalog facts
ComfyUI	NMKD Stable Diffusion GUI
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Distributed on itch.io at a name-your-own-price rate.
Windows, macOS, Linux	Windows
Connects models and processing steps in reusable graphs.	Dependencies included, no manual setup Supports custom models, VAEs, LoRA and Textual Inversion
Local models need suitable hardware and separate model downloads.	Windows only Speed depends on your GPU
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
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 23, 2026

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