Langfuse

Langfuse is an open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications. It provides detailed tracing, observability, prompt management, and evaluation tools natively integrated into a single development workflow. Langfuse works with any model or framework, supports complex nesting, and exposes open APIs for building downstream use cases. Teams can self-host it or use the cloud offering, making it suitable for both startups and enterprises.