SwarmUI
Generation UI on a ComfyUI backend that pairs a simple Generate tab with node graphs and multi-GPU pooling.
About
Alex Goodwin, known as mcmonkey, began this interface inside Stability AI as StableSwarmUI and has maintained it independently since mid-2024. A C# server on .NET 8 drives a ComfyUI backend that the installer sets up for you, and the browser UI offers a Generate tab with ordinary form controls, an image editor, and a Grid Generator for parameter sweeps, plus a Comfy Workflow tab that opens the full ComfyUI node editor. The name reflects its ability to spread jobs across several backends: extra GPUs in one machine, or other machines on a LAN, can be registered as separate backends that share the queue. Model coverage goes beyond Stable Diffusion and Flux to video families such as Wan and LTX and a few audio models. Windows gets an installer batch file; Linux and Apple Silicon Macs need git, Python 3.10 to 3.12, and the .NET SDK, and Docker and cloud GPU templates exist. An HTTP API is included. SwarmUI is MIT licensed, though auto-installed parts such as ComfyUI (GPL) keep their own terms. Current builds are 0.9.x betas the author calls almost-release. Good for hobbyists outgrowing one-click UIs or pooling several GPUs.
Should you use SwarmUI?
Pick it when
You want one MIT-licensed web UI that runs Stable Diffusion, Flux, Qwen Image, and Wan or Hunyuan video on ComfyUI underneath, with a simple Generate tab for users and multi-GPU or server deployment for a team.
Look elsewhere when
You depend on A1111 extensions and scripts, or you want a painter's canvas, where Krita AI Diffusion fits better. It expects a GPU with about 6GB of VRAM; for a simple Mac app, Draw Things needs less setup.
Alternatives to SwarmUI
- ComfyUI
The node-graph engine SwarmUI drives; use it directly for full control over custom pipelines, at the cost of a steeper learning curve.
- AUTOMATIC1111 Web UI
Single-user UI with a deep catalogue of A1111 extensions and scripts, but no native Flux or Wan video support and AGPL-3.0 instead of MIT.
- Forge
Keeps the familiar A1111 layout and extensions while adding Flux and lower VRAM use, better if you have existing A1111 habits.
- Krita AI Diffusion
Uses the same ComfyUI engine from inside Krita, the better fit for painters doing inpainting and region prompts by hand.
Reviews (0)
Leave a Review
No reviews yet. Be the first to review!
Details
- Category
- Image Generation
- Price
- Free
- Platform
- Local/Desktop
- Difficulty
- Easy (2/5)
- License
- MIT
- Minimum VRAM
- 6 GB
- Added
- Apr 3, 2026