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Langfuse

acquired by Click HouseYC W23

Berlin, DE · Founded 2022 · 19 employees · 12 known investors

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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 Technologies Inc. · Finto Technologies, Inc. · Finto · Finto, langfuse

AI & Machine LearningData & InfrastructureDeveloper ToolsEnterprise SoftwareGenerative AIAnalyticsOpen SourceAIGermanyEuropePartly Remote

Founders & leadership· Y Combinator alumni (W23)

Langfuse was founded in 2022 by Marc Klingen, Maximilian Deichmann, and Clemens Rawert.

MKMarc Klingen
Marc KlingenCEO 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.
MDMaximilian Deichmann
Maximilian DeichmannCo-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.
CRClemens Rawert
Clemens RawertCo-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.
MD
Max DeichmannFounder
JM
Jannik MaierhöferGrowth
FK
Felix KrauthGrowth
LW
Leonard WoltersOps

Investors · 12

Lightspeed Venture Partners✓ confirmed by LangfuseMenlo Park · $1M – $5M

How we know: the company's own site · Lightspeed Venture Partners's portfolio page · funding news · langfuse.com · open dataset · 5k.vc investor directory · Y Combinator's founder network · Not right? Tell us

Y Combinator✓ confirmed by LangfuseSan Francisco · $500K

How we know: the company's own site · the Y Combinator directory · langfuse.com · open dataset · 5k.vc investor directory · Not right? Tell us

Angel InvestreportedBerlin · $137.5K

How we know: Y Combinator's founder network · Not right? Tell us

Dragoneer Investment GroupreportedSan Francisco · $100K – $5M

How we know: siliconangle.com · Not right? Tell us

GICreportedSingapore

How we know: siliconangle.com · Not right? Tell us

Index VenturesreportedSan Francisco · $540K – $10.8M

How we know: siliconangle.com · Not right? Tell us

Khosla VenturesreportedMenlo Park · $100K – $20M

How we know: siliconangle.com · Not right? Tell us

La FamigliareportedBerlin

How we know: funding news · langfuse.com · open dataset · 5k.vc investor directory · Y Combinator's founder network · Not right? Tell us

Sequoia CapitalreportedMenlo Park · $100K – $50M

How we know: Y Combinator's founder network · Not right? Tell us

T. Rowe PricereportedBaltimore

How we know: siliconangle.com · Not right? Tell us

Also in the syndicate · 1

WCM Investment Management

Funding

SEC filings, press & company announcements

Source: company announcements and press reports — follow each round's link for the claim.

Images

Langfuse photoLangfuse photo

Founder mafia

2 people who came through Langfuse went on to found or lead other companies.

Felix KrauthGrowthFounded SentoNimar BlumeProduct EngineerFounded Sento

Related companies · 10

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Companies working in the same space as Langfuse.

Legal entities · 2

corporate structure
Finto Technologies Inc.
Finto Technologies, Inc.

In the news

🪢 Langfuse - The Open-Source LLM Engineering Platformycombinator.com · Jan 2025Langfuse raised $4M - Langfuse Bloglangfuse.com · Nov 2023Y Combinator Demo Day 2023: Our favorites Day 2techcrunch.com · Sep 2023Our favorite startups from YC's Summer 2023 Demo Day, Day 1techcrunch.com · Sep 2023Our favorite startups from YC's Summer 2023 Demo Day, Day 1 | TechCrunchtechcrunch.com · Sep 2023🪢 Langfuse - Open-source product analytics for LLM appsycombinator.com · Jul 2023

Frequently 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 General Catalyst, Lightspeed Venture Partners, Y Combinator, Angel Invest, Dragoneer Investment Group, GIC, Index Ventures, Khosla Ventures and 3 more.
Who acquired Langfuse?
Langfuse was acquired by Click House.
Where is Langfuse headquartered?
Langfuse is headquartered in Berlin, DE.