Stable Diffusion — The only generator here you can run on your own hardware for free — and the only one where your images never leave your infrastructure.
Short answer: Stable Diffusion is Stability AI’s family of open-weight image models. You can download SD 3.5 and SDXL and self-host them at no licence cost under the Community License, which permits commercial use below $1 million in annual revenue. Stability’s hosted API prices per credit at $0.01, with Stable Image Core at $0.03 an image, SD 3.5 Medium at $0.035 and Stable Image Ultra at $0.08. A $20 monthly membership includes 6,000 credits.
On this page
Verdict at a glance
Self-hosting. Below $1M in revenue you can run the models on your own hardware with no per-image charge and no data leaving your infrastructure — impossible with every other tool here.
The Community License is revenue-gated at $1 million a year. Cross that threshold and you need an enterprise licence, so build the check into your planning before you depend on it.
Stable Diffusion is the option for people who want control rather than convenience, and it is the only one in this comparison that offers it. Download SD 3.5 or SDXL from Hugging Face, run them on your own GPU, and you pay nothing per image and send nothing to a third party — which matters enormously for regulated industries, sensitive product work, or any pipeline where sending client material to an external API is a compliance conversation. The ecosystem compounds the advantage: fine-tuning, LoRAs, ControlNet and a decade’s worth of community tooling give a level of precise control that no closed model matches, and if a model version changes you are not at a vendor’s mercy because you hold the weights. Two things keep it at four rather than five. The first is that all of this is engineering work — you are trading a $12 subscription for GPU provisioning, environment management and a learning curve that is real, and out-of-the-box aesthetics still trail Midjourney meaningfully. The second is the licence. The Community License permits free commercial use only below $1 million in annual revenue; above that you need an enterprise arrangement. That is a fair term, but it is a threshold worth checking before you build production infrastructure on the assumption of free. If you would rather not self-host, the hosted API is cheap and honest: credits at a cent each, $0.03 to $0.08 an image by model.
Quick facts
| Attribute | Detail |
|---|---|
| Ideal team | Engineering teams needing control, privacy or high volume at low cost |
| Learning curve | High for self-hosting; moderate for the hosted API |
| Setup time | Minutes for the API; hours to days for a self-hosted pipeline |
| Free trial | 25 free credits on account creation via Google sign-in |
| Free tier | Self-hosting is free under the Community License |
| Licence | ⚠️ Community License free commercially below $1M annual revenue |
| API pricing | 1 credit = $0.01 · Core $0.03 · SD 3.5 Medium $0.035 · Ultra $0.08 |
| Membership | $20/mo for 6,000 API credits |
Overview
Stable Diffusion is not really a product in the sense the other tools here are — it is a family of open-weight models you can obtain, inspect, modify and run yourself. That single architectural fact drives everything about how it compares. Where Midjourney, Ideogram, Recraft and Leonardo are services you send prompts to, Stable Diffusion can be infrastructure you own. For teams whose constraint is data residency, compliance, per-image cost at very high volume, or the need to fine-tune a model on proprietary imagery, nothing else in this comparison is a substitute.
Self-hosting is genuinely free of licence cost within a limit. SD 3.5 and SDXL can be downloaded from Hugging Face and run on your own hardware under Stability’s Community License, which permits commercial use for organisations below $1 million in annual revenue. There is no per-image charge, only your compute cost, and your prompts and outputs never leave your infrastructure. Above that revenue threshold an enterprise licence is required — a reasonable term, but one that belongs in your planning rather than in a surprise conversation two years later.
For teams who do not want to run GPUs, Stability’s hosted API is transparently priced. One credit costs $0.01 and a 1,000-credit top-up is $10. Stable Image Core is $0.03 an image, SD 3.5 Medium $0.035 and Stable Image Ultra $0.08; across the SD 3.5 family the credit cost per successful generation runs 2.5 for Flash, 3.5 for Medium, 4 for Large Turbo and 6.5 for Large. There is no monthly membership any more — the old $20/6,000-credit plan has gone and stability.ai/membership redirects to the licence page, leaving pay-as-you-go credits, a free self-host licence and enterprise quotes available. Creating an account through Google sign-in grants 25 free credits. Notably, credits are charged only on successful generation.
Key features
- Open weightsdownload SD 3.5 and SDXL and run them yourself
- Self-hosting with no per-image costfree under the Community License below $1M revenue
- Complete data privacyprompts and outputs never leave your infrastructure
- Fine-tuning and LoRAstrain the model on your own imagery or style
- ControlNet and conditioningprecise structural control over composition
- Model version stabilityyou hold the weights, so nothing changes underneath you
- Hosted APIcredits at $0.01 each if you would rather not run GPUs
- Model tieringFlash, Medium, Large Turbo and Large at different credit costs
- Charged on success onlyfailed generations do not consume credits
- Vast community ecosystemtooling, interfaces and models built around it
Pricing (as of 2026-09-30)
Model: free self-hosting under the Community License, or pay-per-credit hosted API; ⚠️ no monthly subscription is published · Free tier: ⭐ Self-hosting free below $1M revenue; 25 free API credits on signup · Entry paid: Free self-hosted (Community License); API from $0.025 an image
| Plan | Price | Includes |
|---|---|---|
| Self-hosted (Community License) | $0 licence cost | Download SD 3.5 and SDXL from Hugging Face · no per-image charge, only your compute · data never leaves your infrastructure · ⚠️ free commercial use only below $1M annual revenue |
| API pay-as-you-go | 1 credit = $0.01 · 25 free credits on signup | SD 3.5 Flash 2.5 credits ($0.025) · Core 3 ($0.03) · Medium 3.5 ($0.035) · Large Turbo 4 ($0.04) · Large 6.5 ($0.065) · Stable Image Ultra 8 ($0.08) · charged on success only |
| Brand Studio | ⚠️ Quote | Managed creative production platform, positioned for enterprise teams · its ‘See plans’ link leads to a partnerships enquiry, not a price |
| Enterprise licence | Custom | Volume-based pricing with bulk discounts · required above $1M annual revenue for self-hosted commercial use |
⚠️ There is no published monthly subscription. stability.ai/membership now redirects to the Community License page, stability.ai/brand-studio returns 404, and Brand Studio’s own ‘See plans’ link goes to a partnerships enquiry form. The $20-a-month/6,000-credit membership and the later $19 Brand Studio Creator tier are both gone from the vendor’s site, so no subscription price is stated here or in this page’s structured data.
⚠️ The Community License permits free commercial use only for organisations below $1 million in annual revenue. Above that threshold an enterprise licence is required. Verify your position against the licence text before deploying commercially.
⭐ What Stability does publish is the API credit table: 1 credit = $0.01 with 25 free credits on signup, and a stated cost per model — 2.5 credits for SD 3.5 Flash, 3 for Stable Image Core, 3.5 for Medium, 4 for Large Turbo, 6.5 for Large and 8 for Stable Image Ultra. Credits are charged only on a successful generation.
Self-hosting has no licence fee but is not free — you pay for GPU compute, provisioning and engineering time. At low volume a $12 subscription to Recraft or Ideogram is cheaper in total cost of ownership.
Ratings breakdown
Pros
- Free self-hosting under the Community License below $1M annual revenue
- Prompts and outputs never leave your infrastructure when self-hosted
- Fine-tuning and LoRAs let you train on proprietary imagery or house style
- ControlNet gives structural control no closed model matches
- You hold the weights, so a vendor cannot change the model underneath you
- Transparent API pricing at $0.01 per credit with published per-model costs
- API charges only on successful generation
- Enormous community ecosystem of tooling, interfaces and derived models
Cons
- ⚠️ Community License is revenue-gated at $1M — enterprise licence required above
- Self-hosting demands GPU provisioning and real engineering time
- Out-of-the-box aesthetic quality trails Midjourney noticeably
- Steep learning curve compared with a prompt box and a subscription
- No native vector or SVG output — Recraft is the tool for that
- Text rendering inside images is weaker than Ideogram’s
- Community support rather than a vendor SLA below enterprise tiers
- Total cost of ownership can exceed a subscription at low volume
Who it’s for
- Engineering teams needing data residency or compliance-safe generation
- High-volume producers where per-image API costs would dominate
- Anyone fine-tuning a model on proprietary imagery or a house style
- Organisations below $1M revenue who can absorb the self-hosting effort
Who it’s not for
- Non-technical teams who want to type a prompt and get a result
- Low-volume users for whom a $12 subscription is cheaper all-in
- Organisations above $1M revenue expecting free commercial self-hosting
- Teams who need vector output or best-in-class text rendering
Best use cases
- Generating imagery on-premises where client material cannot leave the network
- Fine-tuning a model on a brand’s own photography for consistent house style
- Producing images at volumes where per-image API pricing becomes prohibitive
- Using ControlNet to constrain composition precisely for product imagery
- Prototyping through the hosted API before committing to self-hosted infrastructure
Integrations
Because the weights are open, Stable Diffusion integrates with essentially anything — ComfyUI, Automatic1111, diffusers, and a very large ecosystem of community interfaces and pipelines, plus Stability’s own hosted API for teams who want an endpoint rather than infrastructure. This is the practical payoff of open weights: rather than waiting for a vendor to build the integration you need, you build it, and the model runs wherever your pipeline already runs.
How it compares
| Stable Diffusion | Midjourney | Recraft | Ideogram | |
|---|---|---|---|---|
| Entry paid | Free self-hosted; API from $0.025/image | $10/mo | $12/mo ($10 annual) | ~$20/mo (Plus) |
| Self-hostable | Yes — open weights | No | No | No |
| Data stays private | Yes, when self-hosted | ⚠️ No — Pro at $60 | Paid plans | Plus and above |
| Per-image cost | $0.03-$0.08 API, $0 self-hosted | GPU-hour metered | 1 credit raster, 2 vector | Varies 8x by model |
| Fine-tuning | Yes — LoRAs and full training | No | No | No |
| Aesthetic defaults | Moderate | Best in class | Strong | Strong |
| Best fit | Control and privacy | Aesthetic quality | Brand and vector work | Typography in images |
Midjourney and Recraft prices are as published by each vendor and verified 2026-09-12. Stability API figures are from Stability’s developer platform pricing. Ideogram’s tiers are drawn from published third-party reporting.
Alternatives
Midjourney produces markedly better-looking output with no engineering effort, if you can accept sending your work to a third party. Recraft is the choice for scalable vector assets and gives commercial rights at $12 a month. Ideogram is far better at rendering text inside images. Leonardo AI sits between the two worlds with a hosted product and a usable free tier.
Recent changes
Stability has retired its consumer subscription entirely. The $20-a-month membership that included 6,000 API credits was replaced in September 2026 by Brand Studio tiers, and as of 2026-09-30 those have gone too: stability.ai/membership redirects to the Community License page, stability.ai/brand-studio returns 404, and Brand Studio is presented as a managed platform for enterprise teams whose ‘See plans’ link opens a partnerships enquiry rather than a price. What remains published is the API credit table — 1 credit = $0.01, 25 free credits on signup, and a stated cost per model from 2.5 credits for SD 3.5 Flash to 8 for Stable Image Ultra, charged only on success — together with the Community License, which is free for commercial use below $1 million in annual revenue. Credits no longer roll over.
Frequently asked questions
Is Stable Diffusion free?
Self-hosting is free of licence cost under Stability’s Community License, which permits commercial use for organisations below $1 million in annual revenue. You download SD 3.5 or SDXL from Hugging Face and run them on your own hardware, paying only compute. Above $1M in revenue an enterprise licence is required. The hosted API is separately priced at $0.01 per credit.
How much does the Stability AI API cost?
One credit is $0.01, and a 1,000-credit top-up costs $10. Stable Image Core is $0.03 an image, SD 3.5 Medium $0.035 and Stable Image Ultra $0.08. Within SD 3.5, a successful generation costs 2.5 credits on Flash, 3.5 on Medium, 4 on Large Turbo and 6.5 on Large. Credits are charged only on a successful generation, and there is no monthly membership to buy — the old $20/6,000-credit plan has been retired and stability.ai/membership now redirects to the licence page.
What is the $1 million revenue limit?
Stability’s Community License allows free commercial use of the open weights only for organisations generating under $1 million in annual revenue. Cross that threshold and you need an enterprise licence. It is a fair term, but it is a genuine planning consideration — check your position against the current licence text before building production infrastructure that assumes free self-hosting, and revisit it as the business grows.
Why self-host instead of using a subscription tool?
Three reasons: your prompts and images never leave your infrastructure, which resolves compliance and data-residency questions that block external APIs; there is no per-image charge, so economics improve with volume; and you can fine-tune the model on proprietary imagery. Against that, you take on GPU provisioning and engineering time, so at low volume a $12 subscription to Recraft is cheaper all-in.
Stable Diffusion or Midjourney?
Midjourney if you want the best-looking output with no engineering effort and are comfortable sending work to a third party. Stable Diffusion if you need control, privacy, fine-tuning or high-volume economics, and have the technical capacity to run it. Out-of-the-box aesthetics favour Midjourney clearly; precise controllability favours Stable Diffusion just as clearly.
Can I fine-tune Stable Diffusion on my own images?
Yes, and this is one of its strongest arguments. Full fine-tuning and lighter-weight LoRA training both let you teach the model a specific style, product or brand look, which no closed model in this comparison permits. Combined with ControlNet for structural conditioning, it enables a level of consistency that prompt engineering alone cannot reach.
Do I need a powerful GPU to run Stable Diffusion?
For local self-hosting, yes — practical generation needs a reasonably capable GPU, and larger models need more VRAM. Many teams compromise by renting cloud GPUs, which keeps the licence and control benefits while avoiding hardware purchase, though it reintroduces a third party into the data path. If neither is workable, use Stability’s hosted API at $0.03-$0.08 an image.
Sources
- Stability AI — developer platform pricing, credit table and free credits (read 2026-09-30)
- Stability AI — Community License terms and the $1M revenue threshold (read 2026-09-30); stability.ai/membership now redirects here
- Stability AI — homepage, where Brand Studio is presented for enterprise teams (read 2026-09-30)
Compiled from public sources; last verified 2026-09-30. Pricing is subject to change — verify with the vendor. Ratings reflect editorial opinion based on documented capabilities, published pricing, and aggregated user reviews. DigiJaws does not accept payment for review placement or rating.
Also in: Best AI Image Generators (2026)
Looking for the numbers? Our Stable Diffusion pricing page breaks down every plan, what each upgrade costs over a year, and what the headline price leaves out.
Stable Diffusion Review (4/5): Features & Verdict (2026). DigiJaws, 2026. https://digijaws.com/reviews/stable-diffusion-review/