Langfuse

Langfuse (YC W23) is building the leading open-source LLM engineering platform, providing LLMOps developer tooling focused on observability, evaluations, prompt management, playground, and testing. We help teams collaboratively develop, monitor, evaluate, and debug AI applications. Backed by a $4M seed round from Lightspeed, General Catalyst, and Y Combinator, we work with leading AI teams like Samsara, Twilio, KhanAcademy, and Rocket Money. We value high-quality engineering, elegant solutions, and a strong open-source ethos.