ComfyUI

Open source alternative to Higgsfield AI, Krea AI, RunwayML and Midjourney

140.6K stars
GPL-3.0
Active this week
Last commit 1 day ago

Last verified Oct 20, 2026

Build visual AI workflows with a node-based interface for image, video, 3D, and audio generation. Self-hosted, GPL-3.0 licensed, supports every major model.

Visit website GitHub140.6K

ComfyUI node canvas wiring an input image through 3D angle and colour nodes to an output

Read the full breakdownWho it is for, how it works, trade-offs, the quick start and the FAQ

who it's for

Who ComfyUI is for#

AI artists generating images and videos for client work

ComfyUI lets you build repeatable workflows for specific styles, resolutions, and output formats, then save them as templates. No per-generation billing means you can iterate freely without watching the meter. Workflow versioning and seed recovery let you reproduce any output exactly, which is critical for client revisions.

Skip if:

You only generate a few images per month and prefer the simplicity of a prompt-box UI like Midjourney. For low-volume hobbyist use, the setup overhead and learning curve are not worth it. Stick with a paid API and pay per use.

Developers building AI content pipelines for applications

The local API and reusable subgraphs let you integrate ComfyUI workflows into production applications. Async queueing and partial graph re-execution support batch processing and iterative refinement. Load custom models, stack LoRAs, and expose only the controls your users need via App Mode.

Skip if:

Your application needs multi-tenant isolation, usage-based billing, or SLA compliance from a managed service. Self-hosting means you own infrastructure scaling and security. For managed APIs with guarantees, use Replicate or Hugging Face Inference.

Studios doing high-volume batch generation

ComfyUI's smart VRAM management, model offloading, and async queueing support hundreds of generations per day on a single GPU. No usage caps, no rate limits, no per-generation billing. For studios producing marketing assets, product renders, or concept art at scale, the cost savings over Midjourney or DALL-E are 10x-100x after the first year.

Skip if:

Your studio lacks GPU infrastructure and cannot justify the upfront hardware cost. If you generate fewer than 1,000 images per month, a paid API is cheaper than buying and maintaining a GPU server. ComfyUI's value is in high-volume, long-term use.

Researchers experimenting with cutting-edge models

New open-weight models (Stable Diffusion variants, FLUX updates, video generators) are integrated into ComfyUI within days of release, often before paid platforms support them. Load checkpoints directly, adjust every parameter, and inspect intermediate outputs. The node graph makes it trivial to A/B test model configurations or compare VAE swaps side by side.

Skip if:

You are researching proprietary models (GPT-4 Vision, Gemini, Claude) or need API-based reproducibility for a paper. ComfyUI is for open-weight models only. If your research requires a specific closed model, you must use the vendor's API.

the problem

The problem it solves#

Paid AI generation platforms charge per image or video, lock you into their model selection, and hide the pipeline behind a prompt box. You cannot inspect intermediate steps, tune parameters beyond basic sliders, or run the same workflow offline. For visual professionals working on client projects, this means unpredictable costs, no repeatability guarantees, and zero control over the models or infrastructure. When a platform updates its model or changes pricing, your workflow breaks and your budget explodes. The lack of transparency makes debugging impossible: if an output is wrong, you have no way to see which step failed or how to fix it.

how ComfyUI solves it

How it solves it#

Node graph interface with full parameter control

Build AI workflows by connecting nodes on an infinite canvas. Every model, processing step, VRAM setting, and output format is a node you can inspect, adjust, and rewire. No hidden layers: if something breaks, you can see exactly where and why. Workflows save as JSON, so you can version-control them, share them with your team, or recover the exact setup from generated media.

Multi-modal generation support

Supports image generation (Stable Diffusion 1.5, SDXL, SD3.5, FLUX.1, FLUX.2, Qwen Image, Hunyuan Image), video generation (Wan 2.1, LTX-Video, HunyuanVideo, CogVideoX, Mochi), audio generation (MiniMax H3, Stable Audio 3), and 3D vision models (Hunyuan3D, Depth Anything 3, SAM 3). Load checkpoints, VAEs, LoRAs, ControlNets, and upscalers from supported formats.

Local execution with smart resource management

Runs fully offline on your hardware with asynchronous queueing, partial graph re-execution, and automatic VRAM and RAM management. Model offloading and quantization support let you run large models on consumer GPUs. No internet connection required for core functionality: use the --disable-api-nodes flag to force all built-in features offline.

Broad hardware and platform support

Runs on Windows, Linux, and macOS with native support for NVIDIA, AMD, Intel, and Apple Silicon GPUs. Desktop application available for Windows and macOS. Manual install supports all operating systems and GPU types, including Ascend. Portable Windows package requires no installation.

Workflow templates and App Mode

Browse thousands of community-shared workflows on Comfy Workflows, start from a proven template, and customize it to your needs. App Mode provides a simplified view of workflows with basic controls; flip back to the node graph view anytime to adjust deeper settings. Partner nodes give access to closed-source models like Nano Banana and Seedance.

API endpoints for production pipelines

Integrate workflows into production applications with the local API. Reusable subgraphs, workflow templates, and partial graph re-execution support batch processing and iterative refinement. Save complete workflows and seeds from generated media, so you can reproduce any output exactly.

strengths · trade-offs

Strengths and trade-offs#

Strengths

GPL-3.0 license with self-hostingSelf-hosted tier is GPL-3.0 licensed, so you can run it on your infrastructure, modify the source, and use it commercially as long as you share modifications. Unlike Midjourney (proprietary API with per-image billing) or DALL-E (closed API with rate limits), you pay once for the hardware and own the pipeline. No vendor lock-in, no usage caps, no monthly fees.
126,967 GitHub stars and active developmentOne of the most popular open-source AI projects, with 14,952 forks and weekly releases. The repository pushed code as recently as today (2026-08-12), with a two-week release cycle for major stable versions and continuous integration of the latest models. Strong community support means new models are integrated within days of release.
No per-generation costsOnce you have the hardware, generation is free. Paid platforms charge $10-$60 per month for limited credits or $0.10-$2.00 per image. A self-hosted ComfyUI instance on a mid-range GPU ($500-$1,500 upfront) pays for itself in 3-6 months of heavy use, with no ongoing fees for subsequent years.
Complete control over models and parametersLoad any open-weight model, swap VAEs, stack LoRAs, and adjust every parameter in the generation pipeline. Paid platforms give you prompt boxes and preset styles; ComfyUI gives you the raw graph. For professionals who need repeatability, fine-tuning, or custom model combinations, this control is the entire value proposition.

Trade-offs

-Learning curve for node-based interfaceThe node graph is powerful but not intuitive for users accustomed to prompt-box UIs like Midjourney. New users can start with App Mode (a simplified view with basic controls), but unlocking the full power of ComfyUI requires learning how nodes connect, what each processing step does, and how to debug failed workflows. Expect a 2-4 hour onboarding period before you can build custom workflows confidently.
-Requires local hardware or cloud resourcesSelf-hosting requires a GPU with at least 6GB VRAM for basic image generation, 12GB+ for video or large models. Consumer GPUs (RTX 3060, 4060) work for single-user workflows; production batch processing needs server-grade hardware or cloud instances. Comfy Cloud is available for users without local hardware, but that reintroduces a monthly cost.
-GPL-3.0 copyleft license restricts some commercial useGPL-3.0 requires you to share source code modifications if you distribute the software or run it as a service. If you plan to sell a modified version of ComfyUI or embed it in a proprietary SaaS, you must open-source your changes. For internal use or unmodified self-hosting, this is not a restriction. For SaaS vendors, it is a dealbreaker compared to MIT or Apache 2.0 alternatives.

versus alternatives

ComfyUI vs alternatives#

ComfyUI vs Midjourney

Both generate high-quality images from text prompts, but they serve different deployment models and user profiles. Midjourney is a proprietary Discord-based service with no self-hosting and per-tier usage limits. ComfyUI is open-source with a self-hosted path and no usage caps.

Feature	ComfyUI	Midjourney
License	GPL-3.0	Proprietary
Self-hosting	Yes	No
Interface	Node graph (with App Mode)	Discord bot
Model control	Full (load any checkpoint)	None (preset styles only)
Cost	Free self-hosted / $19-99/mo cloud	$10-$60/mo subscription
Hardware requirement	Local GPU (6GB+ VRAM) or cloud	None (managed service)

ComfyUI is the better choice when you need repeatable workflows, full control over models and parameters, or high-volume generation without per-image billing. A self-hosted instance on a $1,000 GPU pays for itself in 6-12 months compared to Midjourney's $60/month Pro plan. Midjourney is worth considering when you want the simplest possible UI (no setup, no GPU, just type prompts in Discord) and are okay with preset styles and monthly billing.

ComfyUI vs DALL-E

DALL-E is OpenAI's image generation API, priced at $0.04-$0.12 per image depending on resolution. ComfyUI is self-hosted with no per-generation fees. DALL-E is faster to start (no setup), but ComfyUI is cheaper at scale and gives you full pipeline control.

Feature	ComfyUI	DALL-E
License	GPL-3.0	Proprietary API
Pricing	Free self-hosted	$0.04-$0.12 per image
Model access	Open-weight models (SD, FLUX, etc.)	Closed (DALL-E 3 only)
Customization	Full (load LoRAs, swap VAEs, tune steps)	Limited (prompt only)
Output formats	Configurable (PNG, JPEG, raw tensors)	PNG

For developers building AI features into applications, ComfyUI's local API and reusable workflows eliminate vendor dependency and usage-based billing. For one-off prototypes or low-volume use, DALL-E's zero-setup API is simpler.

ComfyUI vs Runway

Runway is a paid platform for AI video and image generation, marketed to creative professionals. ComfyUI supports video generation (Wan, LTX-Video, HunyuanVideo) with a self-hosted path and no subscription fees. Runway has a more polished UI and built-in editing tools; ComfyUI has lower long-term costs and full model control.

Feature	ComfyUI	Runway
License	GPL-3.0	Proprietary
Video generation	Yes (Wan, LTX-Video, HunyuanVideo, Mochi)	Yes (Gen-2, Gen-3)
Self-hosting	Yes	No
Cost	Free self-hosted	$12-$76/mo subscription
Editing tools	Node-based (raw control)	Built-in timeline editor

ComfyUI is better for teams that generate hundreds of videos per month and want to eliminate per-second billing or usage caps. Runway is better for one-off projects where a polished timeline editor and zero setup justify the subscription cost.

install · quick start

Quick start#

bash

Self-hosting uses the desktop application (Windows and macOS), a portable Windows package, or manual installation on all platforms.

```bash
# Desktop app (easiest, Windows and macOS)
# Download from https://www.comfy.org/download

# Manual install (all platforms)
git clone https://github.com/Comfy-Org/ComfyUI
cd ComfyUI
pip install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cu130
pip install -r requirements.txt
python main.py

# CLI install via comfy-cli
pip install comfy-cli
comfy install
```

tech stack · detected from GitHub

What it's built on#

Languages: Python
Frameworks: PyTorch

frequently asked

FAQ#

Is ComfyUI free to use?

Yes. The self-hosted version is GPL-3.0 licensed and free to run on your own hardware. You pay for the server or GPU (one-time cost or monthly cloud instance), but there are no per-generation fees, usage caps, or subscription charges. Comfy Cloud (the managed version) has paid plans for users without local hardware, but the core self-hosted software is free forever.

Can I self-host ComfyUI?

Yes. ComfyUI runs on Windows, Linux, and macOS with support for NVIDIA, AMD, Intel, and Apple Silicon GPUs. The desktop application is the easiest installation path for Windows and macOS. For Linux or custom deployments, the manual install supports all GPU types. Requires Python 3.13 (or 3.12) and PyTorch 2.7+. A mid-range GPU with 6GB+ VRAM is recommended for image generation; video models need 12GB+.

What AI models does ComfyUI support?

ComfyUI natively supports Stable Diffusion 1.5, SDXL, SD3.5, FLUX.1, FLUX.2, Qwen Image, Hunyuan Image, video generators (Wan 2.1, LTX-Video, HunyuanVideo, CogVideoX, Mochi), audio models (MiniMax H3, Stable Audio 3), and 3D vision models (Hunyuan3D, Depth Anything 3, SAM 3). You can load any open-weight checkpoint, VAE, LoRA, ControlNet, or upscaler in supported formats. Partner nodes provide access to closed-source models like Nano Banana and Seedance.

Is ComfyUI better than Midjourney?

ComfyUI is better when you need full control over models, parameters, and infrastructure, or when you are doing high-volume generation and want to eliminate per-image costs. Midjourney is better when you want the simplest possible UI (prompt box, no setup) and are okay paying $10-$60 per month for limited credits. For professionals who generate hundreds of images per week, ComfyUI's upfront hardware cost pays for itself in months. For casual hobbyists, Midjourney's ease of use is worth the subscription.

What hardware do I need to run ComfyUI?

Minimum: a consumer GPU with 6GB VRAM (RTX 3060, AMD RX 6700 XT, or equivalent) for basic image generation. Recommended: 12GB+ VRAM for video models or large batch workflows. ComfyUI supports NVIDIA (CUDA 13.0+), AMD (ROCm 7.2), Intel Arc (XPU), and Apple Silicon (MPS). CPU-only mode works but is 10x-100x slower. For production batch processing, a server with 24GB+ VRAM (RTX 4090, A5000, or cloud instance) is ideal.

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ComfyUI vs Midjourney

Feature	ComfyUI	Midjourney
License	GPL-3.0	Proprietary
Self-hosting	Yes	No
Interface	Node graph (with App Mode)	Discord bot
Model control	Full (load any checkpoint)	None (preset styles only)
Cost	Free self-hosted / $19-99/mo cloud	$10-$60/mo subscription
Hardware requirement	Local GPU (6GB+ VRAM) or cloud	None (managed service)

ComfyUI vs DALL-E

Feature	ComfyUI	DALL-E
License	GPL-3.0	Proprietary API
Pricing	Free self-hosted	$0.04-$0.12 per image
Model access	Open-weight models (SD, FLUX, etc.)	Closed (DALL-E 3 only)
Customization	Full (load LoRAs, swap VAEs, tune steps)	Limited (prompt only)
Output formats	Configurable (PNG, JPEG, raw tensors)	PNG

ComfyUI vs Runway

Feature	ComfyUI	Runway
License	GPL-3.0	Proprietary
Video generation	Yes (Wan, LTX-Video, HunyuanVideo, Mochi)	Yes (Gen-2, Gen-3)
Self-hosting	Yes	No
Cost	Free self-hosted	$12-$76/mo subscription
Editing tools	Node-based (raw control)	Built-in timeline editor

Who ComfyUI is for#

AI artists generating images and videos for client work

Skip if:

Developers building AI content pipelines for applications

Skip if:

Studios doing high-volume batch generation

Skip if:

Researchers experimenting with cutting-edge models

Skip if:

The problem it solves#

How it solves it#

Node graph interface with full parameter control

Multi-modal generation support

Local execution with smart resource management

Broad hardware and platform support

Workflow templates and App Mode

API endpoints for production pipelines

Strengths and trade-offs#

Strengths

Trade-offs

ComfyUI vs alternatives#

ComfyUI vs Midjourney

ComfyUI vs DALL-E

ComfyUI vs Runway

Quick start#

What it's built on#

FAQ#

Similar open-source tools#

Open source tools in these categories#

AI & Machine Learning

Design & Creative

Developer Tools

Find open source alternatives to paid software

Who ComfyUI is for#

AI artists generating images and videos for client work

Skip if:

Developers building AI content pipelines for applications

Skip if:

Studios doing high-volume batch generation

Skip if:

Researchers experimenting with cutting-edge models

Skip if:

The problem it solves#

How it solves it#

Node graph interface with full parameter control

Multi-modal generation support

Local execution with smart resource management

Broad hardware and platform support

Workflow templates and App Mode

API endpoints for production pipelines

Strengths and trade-offs#

Strengths

Trade-offs

ComfyUI vs alternatives#

ComfyUI vs Midjourney

ComfyUI vs DALL-E

ComfyUI vs Runway

Quick start#

What it's built on#

FAQ#

Similar open-source tools#

Open source tools in these categories#

AI & Machine Learning

Design & Creative

Developer Tools

Find open source alternatives to paid software