Pollinations.AI (free text-to-image / text-to-text API)
Pollinations (Berlin, Germany; backed by Outlier Ventures / Softnoise)
Usable anonymously with no registration and no API Key: Flux image generation is permanently free with unlimited use; text models are billed in Pollen credits, with the anonymous free tier getting roughly 1.5 Pollen/week
Tiered rate limits: the Anonymous tier gets 1 request per 15 seconds on basic models, no registration or key needed; the Seed tier (register for free to get a key) gets 1 request per 5 seconds on standard models; higher tiers, Flower/Nectar, are pay-as-you-go Pollen credits (roughly $1 ≈ 1 Pollen). Text/multimodal requests are routed through its gateway (infrastructure partners include Portkey and others) to official models like GPT, Claude, and Gemini — check the official live list for currently available models.
An open-source project (GitHub pollinations/pollinations, roughly 5k stars, 10,000+ commits); the registered corporate entity, based in Berlin, has received investment from firms including Outlier Ventures and Softnoise (verifiable via Crunchbase/PitchBook) — not an anonymous shell site. The vendor lists AWS, Google Cloud, NVIDIA, and OpenAI as infrastructure partners. Positioned for developer prototypes, community tools, and demo use cases; evaluate production stability and SLA yourself. This is a third-party relay: your data passes through its servers, so don't send sensitive content; there's no guarantee of stability or continued operation.