ComfyUI
Node-based visual workflow engine for Stable Diffusion and generative AI
Comfy Org · Image Generation
Launched Jan 2023
Quick Answer
ComfyUI is node-based visual workflow engine for stable diffusion and generative ai, made by Comfy Org. It is free and open source. Key uses: Advanced image generation, Custom diffusion pipelines, Video generation workflows.
Last updated:
Users
65K+ GitHub stars; de facto standard for advanced diffusion workflows
What is ComfyUI?
ComfyUI is a powerful open-source, node-based graphical interface for building and running image, video, and audio generation pipelines. Using a modular graph/flowchart of nodes, users have granular control over every step of the diffusion process. It supports Stable Diffusion, SDXL, SD 3.5, FLUX, and video models, and has become the de facto tool for advanced generative AI creators and researchers.
What's new in ComfyUI in 2026?
Comfy Org formed to steward the project (2024); ComfyUI Desktop app launched; native FLUX and SD 3.5 support; ComfyUI Node Registry & Manager; API nodes for cloud models; 65K+ GitHub stars; powers many commercial AI art backends
How much does ComfyUI cost?
Open-Source
$0
- Full node-based engine
- GPL-3.0 license
- All custom nodes
- Local GPU inference
- API mode
What can you do with ComfyUI?
- Advanced image generation
- Custom diffusion pipelines
- Video generation workflows
- Batch processing
- Research and experimentation
- ControlNet compositing
Pros
- Completely free and open-source
- Granular workflow control
- Runs locally (privacy)
- Huge custom-node ecosystem
- Supports FLUX, SD 3.5, video models
- Shareable/reproducible workflows
Cons
- Steep learning curve
- Node graphs get complex fast
- Requires capable GPU
- Less beginner-friendly than A1111
What are the best alternatives to ComfyUI?
Compare ComfyUI Head-to-Head
Frequently Asked Questions about ComfyUI
How much does ComfyUI cost?
ComfyUI pricing: Open-Source at $0.
Is ComfyUI free?
Yes, ComfyUI is fully free and open source.
What is ComfyUI used for?
ComfyUI is used for: Advanced image generation, Custom diffusion pipelines, Video generation workflows, Batch processing, Research and experimentation, ControlNet compositing.
What are the best alternatives to ComfyUI?
Top alternatives to ComfyUI include Midjourney, Stable Diffusion, Flux, Midjourney.
What platforms does ComfyUI support?
ComfyUI is available on: Windows, macOS, Linux, ComfyUI Desktop, Cloud (RunComfy, etc.).
Details
Underlying Models
Platforms
Integrations
Ideal For
- Advanced AI artists
- Researchers
- Studios building custom pipelines
- Developers embedding generation backends