Sink In

Sink In is a cloud image generation platform launched in 2023, essentially an "SD model rental": it hosts 40+ popular community SD checkpoints, established through ultra-low pay-per-image pricing and a simple developer API, with one-time free credits on signup. It is a "low-cost model rental room" for SD veterans and developers, handing the choices to people who know models.

Core Capabilities

• Community model catalog: 40+ SD1.5/SDXL checkpoints ready to use, including photorealistic/anime and NSFW-oriented Babes series, with top models running millions of times
• Ultra-low pay-per-image pricing: About $0.003 per 512px image at bulk rates, with no subscription lock-in on credits
• Fast GPU inference: The site claims 99.9% reliability over the past 30 days, and reviews confirm second-level image output
• Rich generation parameters: Text-to-image/image-to-image, steps, resolution, ControlNet, LoRA, Hi-Res Fix/ESRGAN upscaling
• Developer API: Integrate with an Access Token plus Notion docs, now with the WAN 2.2 I2V Fast video model added
• Creator revenue share and referral rewards: A share of payments goes to model creators, and inviting friends earns 50 credits each

Use Cases Artists who understand SD/checkpoints and want to use community models without hardware (especially photoreal/anime/NSFW directions), freelancers producing images in batches per project, and developers needing a low-cost image API. Not for beginners expecting one-click results.

Unique Advantages Unlike aggregator platforms such as Replicate and fal.ai, Sink In takes a curated catalog route; the biggest difference is hosting popular community checkpoints with no filtering (including NSFW models), which filtered mainstream platforms don't offer; pricing sits in the market's lowest tier, at the cost of an ecosystem and documentation far weaker than rivals.

Editor's Verdict As a niche "low-cost SD model hosting + API" product, Sink In's value proposition is clear and well executed — overall 4/5. Deductions: low operational transparency, a 404 pricing page, no mainstream reputation evidence, and a model catalog controlled unilaterally by the operator; but it has kept running for 3+ years. General users should keep Replicate/Segmind as safer alternatives.