Langfuse
acquired by ClickHouseYC W23Berlin, DE Β· Founded 2022 Β· 19 employees Β· 10 known investors
Langfuse is an open-source AI engineering platform that helps teams build and monitor production-grade LLM applications. It provides observability and analytics for teams building with large language models and generative AI.
Also known as Finto
AI & Machine LearningData & InfrastructureDeveloper ToolsEnterprise SoftwareGenerative AIAnalyticsOpen SourceAIGermanyEuropePartly Remote
Founders & leadershipΒ· Y Combinator alumni (W23)
Langfuse was founded in 2022 by Marc Klingen, Maximilian Deichmann, and Clemens Rawert.
MK
Marc KlingeninπCEO and Co-founderMarc Klingen previously worked in product, sales, business intelligence, and full-stack engineering roles at Google, DHL, and early-stage startups. He holds a master's degree in Management and Computer Science from Technical University Munich.
MD
Maximilian DeichmanninπCo-FounderMax Deichmann previously built trading systems at Trade Republic, a European fintech company. He has a background in management and computer science, with a graduate degree in the latter field.
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Clemens RawertinπCo-FounderClemens Rawert worked at Scalable Capital, where he supported leadership through multiple growth phases and team scaling; he studied economic history and began doctoral research at Oxford before focusing on startups.
Investors Β· 10
Lightspeed Venture Partnersβ verifiedMenlo Park Β· $1.7M β $87M
Y Combinatorβ verifiedSan Francisco Β· $500K
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General Catalystβ verifiedSan Francisco Β· $30M
GICreportedSingapore
Index VenturesreportedSan Francisco Β· $540K β $10.8M
Khosla VenturesreportedMenlo Park Β· $5K β $50M
La Famigliareported Β· 2 sourcesBerlin
T. Rowe PricereportedBaltimore
Also in the syndicate Β· 2
DragoneerleadWCM Investment Management
Funding
SEC filings, press & company announcements- Undisclosed amountSeries DJan 2026
Dragoneer (lead), GIC, Index Ventures, Khosla Ventures, Lightspeed Venture Partners, T. Rowe Price, WCM Investment Management
Source β - Undisclosed amountseed roundJan 2024Source β
- Undisclosed amountseed roundNov 2023
La Famiglia, Lightspeed Venture Partners, Y Combinator
Source β
Source: company announcements and press reports β follow each round's link for the claim.
Images
Competitors Β· 9
by search overlap
LangChain478 shared keywordsLangChain provides an agent engineering platform and open source frameworks for developers to build, test, and deploy AI agents that can use data and take actions. The platform includes LangSmith for observability and evaluation, and serves enterprise customers including 35% of the Fortune 500.
Netezza297 shared keywordsIBM is a global technology company whose business spans enterprise software (including Red Hat, HashiCorp, and Confluent), IT infrastructure such as mainframes, servers, and storage, and IT consulting services. The company is also investing heavily in quantum computing and AI-based enterprise offerings, including its Lightwell open-source software security clearinghouse and the Anderon quantum wafer foundry.
OpenAI240 shared keywordsOpenAI is an AI research and deployment company focused on developing artificial general intelligence (AGI) with emphasis on safety and beneficial outcomes for humanity.
DataCamp237 shared keywordsDataCamp is a learning platform for teams that teaches data and AI skills through hands-on coursework accessible via web browser and mobile app. It serves enterprise customers and development teams seeking to build technical capabilities.
Hugging Face221 shared keywordsHugging Face is a collaboration platform that hosts and provides access to machine learning models, datasets, and applications. It offers both open-source tools for the ML community and paid compute and enterprise solutions for teams building AI applications.
Docker192 shared keywordsDocker provides containerization and application development platform tools including sandboxes, governance, and security solutions for developers.
Arize158 shared keywordsArize provides observability and evaluation tools for AI systems and large language models, enabling development teams to monitor, debug, and improve AI agents in production.
LiteLLM146 shared keywordsLiteLLM provides an AI gateway that simplifies access to over 100 large language models through a unified OpenAI-compatible interface, with built-in features for fallbacks, spend tracking, and load balancing. The platform serves developers and engineering teams integrating multiple LLM providers into their applications.
Braintrust141 shared keywordsBraintrust provides AI observability and evaluation platform that monitors production AI systems to surface patterns, define quality standards, and automate improvements. The platform serves AI teams across engineering and product organizations.
Companies competing with Langfuse for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
ClickHouse raises $400M Series D led by Dragoneer to accelerate expansion across analytics and AI infrastructure | ClickHouseclickhouse.com Β· Jul 2026Frequently asked questions
- What does Langfuse do?
- Langfuse is an open-source AI engineering platform that helps teams build and monitor production-grade LLM applications. It provides observability and analytics for teams building with large language models and generative AI.
- Who founded Langfuse?
- Langfuse was founded by Marc Klingen, Maximilian Deichmann, Clemens Rawert in 2022.
- Who are Langfuse's investors?
- Langfuse's investors include Lightspeed Venture Partners, Y Combinator, General Catalyst, GIC, Index Ventures, Khosla Ventures, La Famiglia, T. Rowe Price.
- Who acquired Langfuse?
- Langfuse was acquired by ClickHouse.
- Where is Langfuse headquartered?
- Langfuse is headquartered in Berlin, DE.