Stable Diffusion API
Developers who need fast image generation with a free tier.
At a glance
Starts at
$149/month for Open Source Unlimited Plan
Price as published by the vendor, September 2026.
Free tier
Yes, limited
Platforms
Web, API
Best for
Developers, beginners
Not for
Commercial Users Without GPU
4.0 out of 5
Scored by a Toolio reviewer after real useOur verdict
Stable Diffusion API offers easy access to multiple models and a free plan for quick prototyping but falls short on commercial usage limits.
βWhat it does well
Easy Setup30-second setup process with no GPU needed.
Wide Model SupportSupports SD 1.5, SDXL, Flux, ControlNet, LoRA and over 2,800 community models.
Transparent PricingPricing is clear; free tier includes up to 20 image generations per month.
βWhere it falls short
Limited Commercial UsageCommercial use requires paid plans, which may be expensive.
No GPU for Free TierFree tier does not allow commercial usage due to lack of dedicated GPU resources.
Limited Model CustomizationCannot upload custom models, only use community and pre-hosted ones.
Key features
API Key RequiredGet API key to start generating images immediately.
Customizable ParametersAdjust image size, number of generations, prompt enhancements and more.
Free Tier AvailableStart with a free tier offering up to 20 images per month.
Image Quality CustomizationAdjust guidance scale and safety checker settings.