Tool fileDesk: Image
Unstable Diffusion review
Quick answer
More than 120 models and a flat $30 plan with unlimited standard generations, but no ongoing free tier and long data retention.
Free: Possible time-limited trial; no ongoing free tier. Paid: Pro $30/month.
Best for: High-volume generation on many models.
At a glance
- Platforms: Web
- Allows: Adult content with fictional characters, 120+ models incl. SDXL, Pony, Illustrious
- Content rules: Adult content allowed; bans sexual deepfakes of real people, CSAM incl. fictional, bestiality.
- Privacy and retention: Personal data kept indefinitely unless deletion asked; all images visible for moderation review.
- Age verification: 18+ required to disable filter or view explicit content; no verification method described.
Unstable Diffusion
- Official site
- unstability.ai
- Free tier
- Possible time-limited trial; no ongoing free tierPlans and usage (opens in new tab), checked
- From
- Pro $30/month (Unlimited pool for everyday models; premium models use a weekly Heavy pool; Max plans add more)Plans and usage (opens in new tab), checked
- Best for
- High-volume generation on many models
- Platforms
- Web
- Models and styles
- 120+ models: Flux, Seedream, GPT-Image, SDXL, Pony, Illustrious; 40,000+ LoRA influences.
- Character consistency
- Reference images (up to 10 on Seedream 5.0 Pro) and stackable character LoRA influences.
- Editing tools
- Image-to-image and reference-guided edits (Seedream 5.0 Pro); inpaint and upscale not listed.
- Content rules
- Adult content allowed; bans sexual deepfakes of real people, CSAM incl. fictional, bestiality.Acceptable use policy (opens in new tab), checked
- Cost per image
- No per-image price; standard generations unlimited on the $30/month Pro plan.Plans and usage (opens in new tab), checked
- Ownership and private mode
- Ownership not stated; public galleries exist; company may use generated images for marketing.
- Privacy and retention
- Personal data kept indefinitely unless deletion asked; all images visible for moderation review.
- Age verification
- 18+ required to disable filter or view explicit content; no verification method described.
- Setup and ease of use
- Web app, switch models in the prompt box; no setup.
- User reports
- No Trustpilot profile found; topai.tools: 56% of 32 reviews recommend it (third-party).
- Last checked
- by Jun Sato
Strengths
- Large model and LoRA catalog
- Flat-rate unlimited standard generation
- Explicit adult policy
- Reference-image support
Weaknesses
- No ongoing free tier
- Indefinite data retention
- Output ownership not stated
- Slower renders at peak demand
Our notes
Unstable Diffusion runs a web generator at unstability.ai with over 120 models and many community LoRAs. Its acceptable use policy permits adult content with fictional characters and bans real-person deepfakes, CSAM, and bestiality. Pricing is a flat monthly plan with an unlimited pool for standard models.
Check log
The vendor pages we read, the date we read them and what they said. These are document checks of published pages.
| Date | Checked | Found |
|---|---|---|
| Plans and usage (opens in new tab) | Price: Pro $30/month (Unlimited pool for everyday models; premium models use a weekly Heavy pool; Max plans add more)Free tier: Possible time-limited trial; no ongoing free tierCost per image: No per-image price; standard generations unlimited on the $30/month Pro plan. | |
| Acceptable use policy (opens in new tab) | Content rules: Adult content allowed; bans sexual deepfakes of real people, CSAM incl. fictional, bestiality. |
Sources
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Unstable Diffusion alternatives
Image desk →| Tool | Free tier | From | Best for |
|---|---|---|---|
| ComfyUI | Local app is free and open source (GPL-3.0) | Comfy Cloud Standard $20/month ($16 billed yearly) | Technical users wanting full local control |
| Seduced | No free tier listed; 2-day trial $10 (40 credits) | Pro $30/month (300 credits) | Explicit realistic images and video |
| Promptchan | Free plan with daily Gem allowance | Plus $14.99/month (100 Gems) | Quick explicit images with easy edits |
| NovelAI Image Generation | Not published | Tablet $10/month | Private anime-style image generation |
| Civitai Red | Free browsing; Buzz can be earned on site (third-party) | Buzz packs at about 1,000 Buzz per $1 (third-party) | Browsing and using community LoRAs |
| Candy.ai (images) | Free account with limited messages | $3.99/month billed yearly ($47.88) | Companion chat with matching images |