ComfyUI vs A1111 vs Forge vs InvokeAI
The complete feature comparison of every major Stable Diffusion UI in 2026. Filter by your use case to see which one fits. 4 UIs · 11 features · updated June 2026
Feature comparison
| Feature | ComfyUI | AUTOMATIC1111 | SD WebUI Forge | InvokeAI |
|---|---|---|---|---|
| Memory efficiency | ||||
| REST API quality | Built-in REST + WebSocket API. First-class for production. | Built-in API. Less production-ready than ComfyUI. | A1111-compatible API. Same limitations. | Documented REST API. Less production-focused than ComfyUI. |
| UI polish | ||||
| Custom extensions | ✓Vast ecosystem via ComfyUI-Manager. Thousands of nodes. | ✓Extension ecosystem. Smaller than ComfyUI nodes but very large. | ✓A1111-compatible extensions. Also adds Forge-native extensions. | ✓Growing but smaller ecosystem than ComfyUI. |
| Flux support | ✓First-class Flux support. Reference implementation. | ~Via sd-forge-flux plugin. Not native. | ✓Good Flux support, better than A1111. | ✓Full Flux support. |
| LoRA support | ✓ | ✓ | ✓ | ✓ |
| ControlNet | ✓ | ✓ | ✓ | ✓ |
| Canvas / inpainting | —Possible via nodes but not a polished UI feature. | ✓ | ✓ | ✓Best canvas experience of any SD UI — professional art direction. |
| Docker support | ✓Excellent Docker support. Multiple community images. | ✓Works but heavier than ComfyUI. | ✓Similar to A1111. | ✓Good Docker support. |
| Cloud hosting | ✓Runflow, ComfyDeploy, ViewComfy — all run ComfyUI in production. | —Not widely supported by managed platforms. | —Not widely supported by managed platforms. | —Not widely supported by managed platforms. |
| Learning curve | Steep | Easy | Easy | Medium |
| Development status | Very active | Slowing | Very active | Active |
ComfyUI
Node-based workflow engine for production pipelines
- +Best API for production
- +Most flexible pipeline building
- +Widest node ecosystem
- +Best memory management
- +Runflow/ComfyDeploy support
- −Steep learning curve
- −Basic UI (no art direction features)
- −Harder to get started quickly
Ideal for: Backend engineer building an image generation API or complex multi-model pipeline
Production hosting: Runflow (enterprise SLA), ComfyDeploy (managed), ViewComfy. Compare providers →
AUTOMATIC1111
The original — massive extension ecosystem
- +Easiest to get started
- +Enormous extension library
- +Familiar for most users
- +Huge community resources
- −Poor memory efficiency (loads everything upfront)
- −Development slowing vs Forge
- −Less suitable for production APIs
- −No native Flux support
Ideal for: Person experimenting with image generation who wants to get results fast without learning node graphs
SD WebUI Forge
A1111 fork with dramatically better performance
- +30-70% faster than A1111 on same hardware
- +Much better memory management
- +A1111 extension compatible
- +Built-in ControlNet (no extension needed)
- +Active development by lllyasviel
- −Less cloud hosting support
- −API same limitations as A1111
- −Not designed for production APIs
Ideal for: A1111 user who wants a drop-in upgrade for better speed on a consumer GPU (RTX 4090 / 3090)
InvokeAI
Polished UI for professional creative workflows
- +Best UI/UX of any SD tool
- +Excellent canvas for inpainting/outpainting
- +Good for professional creatives
- +Clean project management
- −Smaller node ecosystem vs ComfyUI
- −Not widely hosted by cloud platforms
- −Less focused on API production use
Ideal for: Designer or digital artist who wants a professional app experience for creating and editing images with fine control
Building a product? ComfyUI + Runflow. Experimenting? Forge. Best creative UI? InvokeAI.