Home / Founders / Marc Klingen
Klingen is making LLM tracing and evals an open-source default so teams can own their observability stack.
Marc Klingen is co-founder and chief executive of Langfuse, an open-source LLM engineering platform for observability, prompt management, and evaluations. He co-founded it with Max Deichmann and Clemens Rawert.
Product Roles at Google
Klingen’s YC profile describes experience across product, sales, business intelligence, and full-stack engineering at Google, DHL, and early-stage startups, plus a master’s in management and computer science from Technical University of Munich, according to Y Combinator.
Starting Langfuse
The founders built Langfuse so AI teams could trace production LLM apps and run evals without locking into a closed black box. Langfuse offers cloud and self-hosting; in 2026 the founders continued building after Langfuse joined ClickHouse, per YC.
