Stable Image vs SwarmUI
Stable Image
stability.ai
SwarmUI
swarmui.netSide by side
| Figure | Stable Image | SwarmUI |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 3 | 1 |
| Spec score · AI image generators | 9.0 (#8) | 8.9 (#14) |
| API access | Yes | Yes |
| Free plan | No | Yes |
| Image editing | Yes | Yes |
| Integrations | Stability AI says its foundation models are available on Amazon Bedrock and Amazon SageMaker JumpStart, and Stable Diffusion models are available on Microsoft Azure AI Foundry. | The README documents ComfyUI and AUTOMATIC1111 as supported backend options. |
| Output formats | jpeg,png,webp | PNG,JPG,WebP |
| Product | Stable Image offers Stable Diffusion 3.5 image generation models and image editing services. | SwarmUI is a modular web interface for AI image generation, with support for AI video and some AI audio models. |
| Reference images | Yes | Yes |
| Support | Stability AI provides a support request form through its knowledge base. | The maker directs users to the Discord community for support, discussion, and announcements. |
| Text-to-image | Yes | Yes |
Plans
Stable Image
- Community LicenseFree
- Stability AI API credits$0.01, paid once
- Enterprise LicensePriced on request
In their own words
Stable Image
Stable Image has no write-up on Specifiction yet; its figures are above.
SwarmUI
SwarmUI is a modular web interface for generating images with AI, with support for video and some audio models. Its listed image models include Krea 2, Stable Diffusion, and Flux; video examples include MiniMax H3, Wan, and LTX-2, and ACE-Step is listed for audio. A beginner-oriented Generate tab sits alongside a Comfy Workflow tab that exposes the raw graph for advanced work. SwarmUI can install ComfyUI and use it as a backend, or connect to AUTOMATIC1111. Its tools include an image editor, automatic workflow generation, and Grid Generator, and users can add extensions and custom node packs. By default, it runs on the user's own computer and says it collects no user data. Windows, Linux, and M-Series Mac are listed as compatible; a modern GPU is required, with Nvidia RTX 30xx or newer recommended. Cloud GPU options include a free Google Colab option and templates for Runpod and Vast.ai. SwarmUI is free and open source under the MIT License.