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InvokeAI vs NMKD Stable Diffusion GUI: catalog facts
InvokeAI	NMKD Stable Diffusion GUI
Freemium The community edition is free and open source under Apache 2.0 and runs entirely on your…	Free Distributed on itch.io at a name-your-own-price rate.
Windows, macOS, Linux, Self-hosted	Windows
Unified canvas for inpainting and outpainting instead of regenerating whole images Node-based workflow editor for building reproducible generation pipelines	Dependencies included, no manual setup Supports custom models, VAEs, LoRA and Textual Inversion
Needs a reasonably capable GPU; CPU generation is impractically slow Models are large downloads you manage yourself	Windows only Speed depends on your GPU
Downloadable app, Self-hosted	Downloadable app
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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