Langfuse (acquired by ClickHouse)

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Langfuse is the most popular open source LLMOps platform. It helps teams collaboratively develop, monitor, evaluate, and debug AI applications. Langfuse can be self-hosted in minutes and is battle-tested and used in production by thousands of users from YC startups to large companies like Khan Academy or Twilio.

Acquired by ClickHouse in January 2026.

Berlin, Germany

$4M Seed

DevTools

Onsite

1–10

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