kitio.aiStable Diffusion web UI vs Upscayl
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Stable Diffusion web UI is completely free, while Upscayl is freemium.
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
- Batch upscaling
- Multiple AI models
- Custom model import
- Offline processing
- Cross-platform
| Feature | Stable Diffusion web UI | Upscayl |
|---|---|---|
| Best for | Popular open-source browser interface for local Stable Diffusion | Free open-source desktop app for AI image upscaling |
| Category | Image | Image |
| Pricing model | Free | Freemium |
| Starting price | Free | $24.99/mo |
| Free plan | Yes, fully free | Yes |
| Made by | AUTOMATIC1111 | Upscayl |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Stable Diffusion web UI is completely free, while Upscayl is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free Trial
Free
- 10 credits included
- Desktop app is free and open source
Pro
$24.99/mo
- 300 credits per month
- Unused credits roll over
- Upscale up to 256MP
- 6 months unlimited storage
Business
Custom
- Custom amount of credits
- Priority email and chat support
- Unlimited storage
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
Upscayl
- Free and unlimited locally
- Simple interface
- Works offline
- Needs a Vulkan-capable GPU
- Can invent details on faces
- No editing tools
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 Upscayl if you want:
- Free and unlimited locally
- Simple interface
- Works offline
Watch out: needs a vulkan-capable gpu.
Stable Diffusion web UI vs Upscayl FAQ
What is the difference between Stable Diffusion web UI and Upscayl?
Stable Diffusion web UI: Popular open-source browser interface for local Stable Diffusion. Upscayl: Free open-source desktop app for AI image upscaling. Both are image tools.
Is Stable Diffusion web UI or Upscayl cheaper?
Stable Diffusion web UI is completely free, while Upscayl is freemium.
Do Stable Diffusion web UI and Upscayl have free plans?
Stable Diffusion web UI: Yes, fully free. Upscayl: Yes.
Who makes Stable Diffusion web UI?
Stable Diffusion web UI is made by AUTOMATIC1111.
Who makes Upscayl?
Upscayl is made by Upscayl.
Which should I choose, Stable Diffusion web UI or Upscayl?
Choose Stable Diffusion web UI if you value free and fully local and huge extension library. Choose Upscayl if you value free and unlimited locally and simple interface.