kitio.aiStable Diffusion web UI vs SwarmUI
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Stable Diffusion web UI starts at Free and SwarmUI starts at Free. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Text-to-image and img2img
- Inpainting
- Extensions ecosystem
- Upscaling
- Prompt matrix and X/Y plots
- Simple generate tab
- Built-in ComfyUI workflows
- Grid comparisons
- Multi-GPU support
- Video model support
| Feature | Stable Diffusion web UI | SwarmUI |
|---|---|---|
| Best for | Popular open-source browser interface for local Stable Diffusion | Open-source image generation UI with a ComfyUI engine underneath |
| Category | Image | Image |
| Pricing model | Free | Free |
| Starting price | Free | Free |
| Free plan | Yes, fully free | Yes, fully free |
| Made by | AUTOMATIC1111 | mcmonkey |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Stable Diffusion web UI starts at Free and SwarmUI starts at Free. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
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
Stable Diffusion web UI
- Free and fully local
- Huge extension library
- Familiar tab layout
- Slow to support new models
- Setup needs some tech skill
- Development has slowed
SwarmUI
- Easier than raw ComfyUI
- Supports new models quickly
- Can use multiple GPUs
- Smaller community than A1111
- Local setup required
- Docs assume some knowledge
Which one should you choose?
Choose Stable Diffusion web UI if you want:
- Free and fully local
- Huge extension library
- Familiar tab layout
Watch out: slow to support new models.
Choose SwarmUI if you want:
- Easier than raw ComfyUI
- Supports new models quickly
- Can use multiple GPUs
Watch out: smaller community than a1111.
Stable Diffusion web UI vs SwarmUI FAQ
What is the difference between Stable Diffusion web UI and SwarmUI?
Stable Diffusion web UI: Popular open-source browser interface for local Stable Diffusion. SwarmUI: Open-source image generation UI with a ComfyUI engine underneath. Both are image tools.
Is Stable Diffusion web UI or SwarmUI cheaper?
Stable Diffusion web UI starts at Free and SwarmUI starts at Free. Check both pricing pages for current plans.
Do Stable Diffusion web UI and SwarmUI have free plans?
Stable Diffusion web UI: Yes, fully free. SwarmUI: Yes, fully free.
Who makes Stable Diffusion web UI?
Stable Diffusion web UI is made by AUTOMATIC1111.
Who makes SwarmUI?
SwarmUI is made by mcmonkey.
Which should I choose, Stable Diffusion web UI or SwarmUI?
Choose Stable Diffusion web UI if you value free and fully local and huge extension library. Choose SwarmUI if you value easier than raw comfyui and supports new models quickly.