Helicone

Helicone is an open-source LLM observability, request caching, and routing platform built for generative AI applications. By adding a single line of integration code, developers can log API calls, track costs, and debug prompts across model providers. The platform handles request caching, rate limit management, and fallback routing during upstream provider degradation.

Ecosystem functionProvides developer-first observability and caching proxy tooling to monitor and optimize production LLM applications.

Business modelFreemium SaaS subscription based on logged events