ComfyOnline

ComfyOnline is a web platform for running ComfyUI workflows and generating APIs, helping you build AI apps without managing your own GPU infrastructure.

AI Developer Tools AI API Design AI App Builder

Visit Website

Overview

ComfyOnline is an online platform for running ComfyUI workflows and deploying APIs from them. It is aimed at people who want to build AI applications with ComfyUI without managing their own GPU setup or infrastructure.

The product emphasizes a managed workflow runtime: it handles installation and model downloads, charges for runtime rather than idle usage, and can generate APIs so workflows can be integrated into downstream applications. The site also presents examples and templates across image generation, video generation, audio, and LLM use cases.

Core features

Online ComfyUI workspace

Run ComfyUI in an online environment instead of provisioning and maintaining your own GPU machine.

Managed setup

Skip dependency setup and model downloads so you can focus on building workflows rather than configuring the runtime.

API generation

Generate APIs from workflows with one click, which lets you turn a ComfyUI workflow into a callable backend for an app.

Runtime-based billing

Pay only while workflows are running, with no idle GPU charge while you are editing or not actively using the runtime.

Auto-scaling runtime

Scale automatically when traffic increases, so the platform can handle larger demand without manual infrastructure changes.

Multi-modal workflow support

Work with supported AI services and custom nodes spanning video, image, audio, and LLM workflows.

Common use cases

Interactive workflow creation
Use the web workspace to build and iterate on ComfyUI workflows without renting and configuring a separate GPU instance.
AI app backend creation
Turn a workflow into an API so another app or service can trigger it without manually opening the ComfyUI editor.
Workflow discovery and prototyping
Explore image, video, audio, and language-model workflow examples to understand what kinds of outputs the platform supports.
Cost-conscious experimentation
Use the runtime-based model when you want to avoid paying for idle compute while you are editing or waiting between runs.
Template-led experimentation
Start with preset examples and templates when you want to adapt an existing ComfyUI workflow instead of building everything from scratch.

Pros and Cons

Pros

Lets you run ComfyUI online without buying dedicated hardware.
Removes setup work such as dependency installation and model downloads.
Generates APIs from workflows for application integration.
Charges for runtime rather than idle editing time.
Supports a broad set of workflow examples across image, video, audio, and LLM tasks.

Cons

The public source does not fully document workflow privacy, so teams should verify sharing and access controls before relying on it.
The pricing page shows multiple GPU tiers and credit costs, but the exact cost depends on runtime usage and selected hardware.

FAQ

What is ComfyOnline?

ComfyOnline is an online environment for running ComfyUI workflows in the browser and generating APIs from those workflows for application development.

Why use ComfyOnline instead of running ComfyUI locally?

The site positions ComfyOnline as a way to run ComfyUI without buying dedicated GPU hardware, handling dependency installation and model downloads for you.

How does pricing work?

The workflow editor is free to use, and billing is based on runtime. The pricing page also shows credit-based paid plans and monthly unlimited plans.

What kinds of workflows can I explore?

The explore page shows examples across image, video, audio, and LLM workflows, including ComfyUI workflows and app templates.

Are imported or created workflows private?

The site lists workflow privacy as a common question, but the provided source text does not include the answer, so privacy details should be checked on the product site before use.