Langfuse

Acquired

Open-source LLM engineering platform for collaboratively developing, monitoring, evaluating, and debugging AI applications. Provides application tracing, prompt management, evaluation pipelines, and analytics. Y Combinator W23 batch. Acquired by ClickHouse in January 2026.

Founders Marc Klingen, Clemens Rawert

CEO Marc Klingen

Company

Founded

2022

Headquarters

Berlin, Germany

Financials

Total Funding

$5M

Sectors

Artificial Intelligence Developer Tools Data & Analytics

langfuse.com Twitter Blog

Funding History

2 rounds

Acquired by ClickHouse Jan 16, 2026

Seed Nov 7, 2023

$4M

Lightspeed Venture Partners (Lead) La Famiglia Y Combinator

Pre Seed Jan 1, 2023

$500K

Y Combinator (Lead)

Funding data is compiled from multiple independent sources including company announcements, press coverage, and regulatory filings. While we strive for accuracy, amounts and dates may reflect reported figures at time of announcement.