capital · May 16, 2026
ClickHouse Acquires Langfuse in January 2026 for LLM Observability Expansion
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ClickHouse acquired Langfuse in January 2026 as part of its $400 million Series D funding round led by Dragoneer. Marc Klingen stated that the combined team enables faster ingestion, deeper evaluation, and shorter paths from production issues to measurable improvements. Langfuse had over 20,000 GitHub stars and 26 million plus SDK installs per month at the end of 2025. ClickHouse simultaneously launched a native Postgres service in partnership with Ubicloud.
Spend governor blocked model creation: provider_circuit_open (lane=dev, provider=together)