OpenRouter gives you access to every model. Promptly makes every call cheaper.
Our Take
OpenRouter and Promptly serve different primary goals. OpenRouter is the best choice when you need access to a wide range of models - especially open-source ones like Llama, Mistral, or Qwen - through a single API key. Note that OpenRouter adds a markup on top of provider prices, so you pay slightly more per token than going direct. Promptly takes the opposite approach: it actively reduces what you pay per call through prompt compression, semantic caching, context pruning, and smart routing - with no markup, only a share of the savings it generates. They're not mutually exclusive - Promptly could sit in front of OpenRouter, adding an optimization layer over OpenRouter's broad model catalog.
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