Langfuse

Open source LLM engineering platform

by Marc Klingen, Max Deichmann, Hassieb Pakzad·Developer Tools·YC Winter 2023·tracked since Sep 25, 2026
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Monthly revenue–Not shared yet
Rank–Unranked
Last 30 days–Growth in MRR
Revenue per founder–3 founders

About Langfuse

Traces, evals, prompt management and metrics to debug and improve your LLM application. Onboard via https://langfuse.com Langfuse helps you build and improve LLM applications across the entire lifecycle: - Develop: Observability, Langfuse UI & Prompt Management - Monitor: Traces, Analytics, Metrics & Evaluations - Test: Experiments, Releases & Datasets We are hiring: https://langfuse.com/careers Langfuse was acquired by Clickhouse in January of 2026.

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Questions

Who founded Langfuse?

Langfuse was founded by Marc Klingen, Max Deichmann, Hassieb Pakzad.