kitio.aiComfyUI vs NMKD Stable Diffusion GUI
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. NMKD Stable Diffusion GUI is completely free, while ComfyUI is freemium.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Node graph editor
- Custom nodes ecosystem
- Shareable workflows
- Video and 3D support
- Comfy Cloud
- Text-to-image and image-to-image
- Custom models, LoRA and VAE
- InstructPix2Pix editing
- Built-in upscaling
- Prompt queue and history
- Tileable image output
| Feature | ComfyUI | NMKD Stable Diffusion GUI |
|---|---|---|
| Best for | Node-based open-source interface for building image AI workflows | Windows app for running Stable Diffusion locally on your own GPU |
| Category | Image | Image |
| Pricing model | Freemium | Free |
| Starting price | $20/mo | Free |
| Free plan | Yes | Yes, fully free |
| Made by | Comfy Org | N00MKRAD |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
NMKD Stable Diffusion GUI is completely free, while ComfyUI is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
5 plans
Free
Free
- Open-source local app
- 5 free cloud runs for new users
Standard
$20/mo
- 30-minute max workflow runtime
- 4 concurrent agent sessions
- Add credits anytime
Creator
$35/mo
- Import your own models
- 6 concurrent agent sessions
- 5 builds
Pro
$100/mo
- Workflow runtime up to 1 hour
- 8 concurrent agent sessions
- 10 builds
Team
$700/mo
- For teams sharing workflows
- Shared credit pool
- 16 concurrent agent requests
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
ComfyUI
- Maximum control over pipelines
- Supports new models quickly
- Free to run locally
- Steep learning curve
- Needs a capable GPU locally
- Custom nodes can break on updates
NMKD Stable Diffusion GUI
- Runs fully offline
- No complicated installation
- Supports custom models and LoRA
- Windows only
- Needs a capable GPU
- Unfiltered output, no content safeguards
Which one should you choose?
Choose ComfyUI if you want:
- Maximum control over pipelines
- Supports new models quickly
- Free to run locally
Watch out: steep learning curve.
Choose NMKD Stable Diffusion GUI if you want:
- Runs fully offline
- No complicated installation
- Supports custom models and LoRA
Watch out: windows only.
ComfyUI vs NMKD Stable Diffusion GUI FAQ
What is the difference between ComfyUI and NMKD Stable Diffusion GUI?
ComfyUI: Node-based open-source interface for building image AI workflows. NMKD Stable Diffusion GUI: Windows app for running Stable Diffusion locally on your own GPU. Both are image tools.
Is ComfyUI or NMKD Stable Diffusion GUI cheaper?
NMKD Stable Diffusion GUI is completely free, while ComfyUI is freemium.
Do ComfyUI and NMKD Stable Diffusion GUI have free plans?
ComfyUI: Yes. NMKD Stable Diffusion GUI: Yes, fully free.
Who makes ComfyUI?
ComfyUI is made by Comfy Org, based in United States.
Who makes NMKD Stable Diffusion GUI?
NMKD Stable Diffusion GUI is made by N00MKRAD.
Which should I choose, ComfyUI or NMKD Stable Diffusion GUI?
Choose ComfyUI if you value maximum control over pipelines and supports new models quickly. Choose NMKD Stable Diffusion GUI if you value runs fully offline and no complicated installation.