The open-source image generation powerhouse you can run yourself.
Stable Diffusion is the open-source alternative that democratised AI image generation. Because the models are freely available, you can run them on your own computer, fine-tune them on your own style, and build commercial products on top without per-image fees.
It powers countless apps and services behind the scenes, and its ecosystem of community models on sites like Civitai is unmatched for variety.
Open Source
Free and open source — use the hosted version or self-host it yourself.
Developers, hobbyists and businesses that want full control, custom styles or private on-device image generation.
Stable Diffusion is the tinkerer's dream: free, private and infinitely customisable. It demands more effort than cloud tools, but nothing else gives you this much power for zero ongoing cost.
Scores reflect hands-on testing across the four criteria above, relative to the tool’s pricing tier. Last updated: September 23, 2026
The gold standard AI image generator for stunning, artistic visuals.
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