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Overview
Langfuse provides open-source observability and analytics for Language Learning Machine (LLM) applications. It helps teams trace and debug complex LLM workflows by recording production traces that show every step in an LLM chain, including unlimited nested actions, exact costs, and token-level details for prompts and completions. It also tracks non-LLM actions like database queries and API calls to give a full view of an application's performance. The platform offers prebuilt analytics focused on token usage, cost, latency, and trace scores, all linked to traces to help identify root causes quickly. Langfuse integrates with popular frameworks and libraries and offers a public API and typed SDKs for Python and JS/TS so teams can build custom dashboards and features. Its goal is to make it easier to observe, cost, and optimize LLM-powered applications by providing clear visibility and actionable insights.
About Langfuse
Industries
Data & Analytics
Enterprise Software
AI & Machine Learning
Company Size
11-50
Company Stage
Seed
Total Funding
$4.1M
Headquarters
Berlin, Germany
Founded
2022
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Simplify's Take
What believers are saying
- ClickHouse's January 2026 acquisition adds capital, distribution, and enterprise credibility.
- Berlin and San Francisco hiring in September 2026 signals continued product and GTM expansion.
- March 2026 performance gains improve retention by making large-project debugging materially faster.
What critics are saying
- ClickHouse can subsume Langfuse's roadmap, turning the team into a feature group.
- Open beta v4 still lacks a self-hosted migration path, delaying enterprise upgrades.
- Open-source observability is crowded; Arize Phoenix and OpenTelemetry erode Langfuse's niche fast.
What makes Langfuse unique
- January 2026 ClickHouse acquisition gives Langfuse deeper ClickHouse performance leverage.
- March 2026 v4 moved to an observations-centric ClickHouse model, cutting dashboard loads 10x.
- Langfuse remains open-source and self-hostable, preserving developer trust and adoption.
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Funding
Total Funding
$4.1M
Below
Industry Average
Funded Over
2 Rounds
Lightspeed Venture Partners
Y CombinatorIndustry standards
Benefits
Remote Work Options
Hybrid Work Options
Unlimited Paid Time Off
Paid Vacation
Flexible Work Hours
Wellness Program
Mental Health Support
Conference Attendance Budget
Professional Development Budget
Stock Options
Company Equity
401(k) Retirement Plan
401(k) Company Match
Healthcare?
Phone/Internet Stipend
Home Office Stipend
Growth & Insights and Company News
6 month growth
↑ 0%1 year growth
↑ 9%2 year growth
↑ 4%Our goal continues to be building the best LLM engineering platform
ClickHouse valued at $15 billion, acquires Langfuse in AI analytics market. ClickHouse, a database analytics firm, has raised $400 million in a series D round led by Dragoneer, valuing the company at $15 billion. The investment highlights the growing demand for real-time analytics software as companies deploy AI features. ClickHouse competes with Databricks and Snowflake, and has also acquired Langfuse, an open-source platform for creating and testing large language models. Ask Aime: How might the recent investment in ClickHouse impact its stock performance and potential for growth in the real-time analytics software market? Or continue with others.
ClickHouse, a database management company, has raised $400 million in a Series D round led by Dragoneer Investment Group, valuing the firm at $15 billion. Bessemer Venture Partners, GIC and Index Ventures also participated. The funding reflects investor enthusiasm for real-time analytics providers as companies deploying AI tools require fast data management for soaring volumes. ClickHouse's technology enables rapid query responses, competing with Databricks and Snowflake in helping firms build and run AI applications. Founded in 2009, ClickHouse serves customers including Meta, Cursor, Sony and Tesla with open-source database software for real-time analytics. The company also announced the acquisition of Langfuse, an open-source platform for creating and monitoring large language models. The valuation follows Databricks' recent $4 billion raise at $134 billion valuation.
Hugging Face and Langfuse are popular platforms for developing and running LLM applications.
We're thrilled to announce that Langfuse, the open source observability and analytics solution for LLM applications, has raised a $4m seed round from Lightspeed Venture Partners, La Famiglia and Y Combinator.
Langfuse is Hiring for 7 Jobs on Simplify!
Find jobs on Simplify and start your career today
About Langfuse
Industries
Data & Analytics
Enterprise Software
AI & Machine Learning
Company Size
11-50
Company Stage
Seed
Total Funding
$4.1M
Headquarters
Berlin, Germany
Founded
2022
Langfuse is Hiring for 7 Jobs on Simplify!
Find jobs on Simplify and start your career today