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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
- July 2026 changelog added MCP tools, assistant beta, and GitHub Actions experiment checks.
- May 2026 full-text search cut a 494-GB scan to under half a second.
- ClickHouse says Langfuse ended 2025 above 20,000 GitHub stars and 26 million installs.
What critics are saying
- Braintrust, Arize Phoenix, and Helicone all target the same observability and evaluation budgets.
- ClickHouse owns Langfuse now, so roadmap control and hiring autonomy sit outside Berlin.
- If ClickHouse prioritizes database cross-sell, Langfuse becomes a feature, not an independent company.
What makes Langfuse unique
- January 16, 2026 acquisition by ClickHouse gives Langfuse deep storage and query-engine leverage.
- Langfuse runs on ClickHouse for cloud and self-hosted deployments, simplifying high-volume traces.
- Open-source MIT licensing and self-hosting keep it portable across teams and infrastructures.
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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
↓ -8%1 year growth
↑ 10%2 year growth
↑ 10%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!
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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