kitio.aiStable Diffusion web UI vs ComfyFlow
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 ComfyFlow 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
- Workflow to web app
- Hosted GPUs
- Private workflows
- App sharing
- Creator rewards program
| Feature | Stable Diffusion web UI | ComfyFlow |
|---|---|---|
| Best for | Popular open-source browser interface for local Stable Diffusion | Turns ComfyUI workflows into shareable hosted web apps |
| Category | Image | Image |
| Pricing model | Free | Freemium |
| Starting price | Free | See pricing page |
| Free plan | Yes, fully free | Yes |
| Made by | AUTOMATIC1111 | ComfyFlow |
| 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 ComfyFlow is freemium.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 100 credits
- Try public apps
Basic
$8/mo billed yearly
- 12,000 credits per year
- Private generations
Pro
$16/mo billed yearly
- 24,000 credits per year
- API access to apps
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
ComfyFlow
- No GPU server to manage
- Workflow stays hidden from users
- Open source codebase
- Only useful if you work with ComfyUI
- Credit limits on the free plan
- Small community compared with ComfyUI itself
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 ComfyFlow if you want:
- No GPU server to manage
- Workflow stays hidden from users
- Open source codebase
Watch out: only useful if you work with comfyui.
Stable Diffusion web UI vs ComfyFlow FAQ
What is the difference between Stable Diffusion web UI and ComfyFlow?
Stable Diffusion web UI: Popular open-source browser interface for local Stable Diffusion. ComfyFlow: Turns ComfyUI workflows into shareable hosted web apps. Both are image tools.
Is Stable Diffusion web UI or ComfyFlow cheaper?
Stable Diffusion web UI is completely free, while ComfyFlow is freemium.
Do Stable Diffusion web UI and ComfyFlow have free plans?
Stable Diffusion web UI: Yes, fully free. ComfyFlow: Yes.
Who makes Stable Diffusion web UI?
Stable Diffusion web UI is made by AUTOMATIC1111.
Who makes ComfyFlow?
ComfyFlow is made by ComfyFlow.
Which should I choose, Stable Diffusion web UI or ComfyFlow?
Choose Stable Diffusion web UI if you value free and fully local and huge extension library. Choose ComfyFlow if you value no gpu server to manage and workflow stays hidden from users.