Choose ComfyUI when
Most flexible diffusion pipeline anywhere. Massive custom-node ecosystem
The cost of that choice
Steep learning curve — graph thinking required. Workflows break when nodes update
[ HEAD-TO-HEAD · UPDATED 2026-05-19 ]
ComfyUI vs AUTOMATIC1111 vs InvokeAI
Which diffusion workflow engine should you commit to?
ComfyUI wins on flexibility and new-model support. A1111 wins on extension breadth. InvokeAI wins on production polish and canvas-first work.
Decision briefing
Choose AUTOMATIC1111 (stable-diffusion-webui) when
Approachable forms-based UI. Massive extension ecosystem
The cost of that choice
Slower to adopt new models. Gradio UI feels dated
Choose InvokeAI when
Best canvas in OSS SD. Clean queue system
The cost of that choice
Smaller plugin ecosystem than A1111. Newer-model support lags ComfyUI
Switching costs people miss
The feature table is only the starting point. Before moving, inventory saved projects, model formats, extensions, prompts, automation hooks, and collaborators who depend on the current workflow. A nominally stronger tool can be the worse choice when migration breaks a stable production path.
- Workflow portability: confirm whether projects export as reusable files or remain tied to a hosted account.
- Ecosystem fit: check required models, nodes, plug-ins, and version pinning—not only headline features.
- Hardware and recurring cost: compare local VRAM/RAM requirements with subscription or API limits over a realistic month.
- Exit plan: preserve source assets and settings so a pricing or licensing change does not trap the project.
How to use this comparison: eliminate options that fail a hard constraint first, then choose between the survivors using the scenario cards above. Scores are editorial signals described in our methodology, not laboratory benchmarks.
The nodal workflow engine for serious diffusion.
OPEN SOURCE
Visit ComfyUIActually FreeNo SignupOpen Source
The original SD power-user webUI.
OPEN SOURCE
Visit AUTOMATIC1111 (stable-diffusion-webui)Actually FreeNo SignupOpen Source
Production-leaning SD studio with canvas & batch.
OPEN SOURCE
Visit InvokeAIActually FreeNo SignupOpen Source
The nodal workflow engine for serious diffusion. | The original SD power-user webUI. | Production-leaning SD studio with canvas & batch. | |
|---|---|---|---|
| Pricing | OPEN SOURCE | OPEN SOURCE | OPEN SOURCE |
| Free tier | Fully free and open source. You provide the hardware (or rent a GPU pod). | Fully free / open source. Hundreds of community extensions. | Community edition is free + OSS. Paid Pro tier for teams. |
| Best for | Most flexible diffusion pipeline anywhere | Approachable forms-based UI | Best canvas in OSS SD |
| Watch out for | Steep learning curve — graph thinking required | Slower to adopt new models | Smaller plugin ecosystem than A1111 |
| Platforms | windows, mac, linux, docker, cli | windows, mac, linux, cli | windows, mac, linux, docker |
| Min VRAM | 6 GB | 4 GB | 8 GB |
| Rec. VRAM | 16 GB | 12 GB | 16 GB |
| Compute | local | local | local |
| Power score | 98/100 | 88/100 | 84/100 |
| Verified badges | Actually FreeNo SignupOpen SourceWatermark-FreeHobbyist-OKWorkflow Engine | Actually FreeNo SignupOpen SourceWatermark-FreeHobbyist-OKAPIWorkflow Engine | Actually FreeNo SignupOpen SourceWatermark-FreeHobbyist-OKAPIWorkflow Engine |
| Visit ComfyUI | Visit AUTOMATIC1111 (stable-diffusion-webui) | Visit InvokeAI |
[ NEXT STEP ]
Turn the comparison into a hardware-filtered recommendation for your goal and platform.