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ComfyUI

Free

The most powerful and modular diffusion model GUI, api and backend with a graph/nodes interface.

Image GeneratorsFreeFree tier
Type
Open Source
Founded
2023
Visit Website GitHub (111.2k stars)

About ComfyUI

Comfy (ComfyUI) is the AI creation engine for visual professionals, offering a powerful and modular graph/nodes interface for building AI pipelines. It provides full control over every model, every parameter, and every output. Originally open-sourced in January 2023, it has grown to support 60,000+ custom nodes and thousands of community-shared workflows. Users can run Comfy locally via Desktop or leverage Comfy Cloud for cloud-based execution with usage-based pricing. The platform also offers an API for production endpoints and enterprise-grade infrastructure. Features include App Mode for beginners, parallel job execution, custom LoRA importing, and a library of 900+ pre-installed models.

Key Features

Node-based interface for building AI pipelines
App Mode for simplified workflow view
60,000+ custom nodes
Community-shared workflow templates
Comfy Desktop for local execution
Comfy Cloud with GPU-powered execution
Comfy API for production endpoints
Comfy Enterprise for organizations
Ability to import custom models and LoRAs
Parallel job execution

Pros & Cons

Pros
  • Full control over every model, parameter, and output
  • Modular and extensible with 60,000+ community nodes
  • Open-source foundation with active community
  • Supports both local desktop and cloud execution
  • App Mode lowers learning curve for beginners
  • Usage-based cloud pricing with no idle charges
  • Enterprise-grade infrastructure available
Cons
  • Steep learning curve for node-based workflow design
  • Cloud pricing can become expensive for heavy usage
  • Credit-based system may require careful management
  • Some advanced features limited to higher-tier cloud plans

Best For

Professional visual AI creation and editingVideo generation and image-to-videoImage generation and manipulationCreative prototyping and experimentationProduction workflow automation via APIEnterprise-scale creative infrastructure

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FAQ

How does Comfy Cloud pricing actually work?
Every plan includes a monthly pool of credits. Credits are spent on active GPU time while a workflow is running and Partner Nodes. You are never charged for idle time. Building or editing a workflow costs nothing. You only spend while a job is actually running.
What's a credit worth? How far does it go?
Credits map to GPU runtime, so mileage depends on the workflow. As a reference point, a five-second video uses roughly 11 credits (based on Wan 2.2 Image-to-Video template).