# Marc Klingen (slim)

> Marc Klingen is co-founder of Langfuse (ClickHouse). Langfuse API + MCP on Anchor Terminal, with grades, an about and public profiles.

- Full: https://www.anchorterminal.com/people/marc-klingen/index.md (~800 tokens) · this version ~580 tokens · JSON https://www.anchorterminal.com/people/marc-klingen/index.json · canonical https://www.anchorterminal.com/people/marc-klingen/
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-28
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Co-founder, Langfuse (ClickHouse).

Marc Klingen is co-founder and CEO of Langfuse, the open-source LLM engineering platform from Y Combinator's Winter 2023 batch.

- LinkedIn: https://www.linkedin.com/in/marcklingen/
- X: https://x.com/marcklingen

## What Marc builds

- [Langfuse API + MCP](https://www.anchorterminal.com/tools/langfuse.md), graded BB, 74.8/100, in Agent observability & evals. Open-source tracing, evaluation, prompt management and datasets for LLM apps and agents, built on OpenTelemetry. Co-founder, Langfuse (ClickHouse), researched 2026-10-26.

## Works with

- [Clemens Rawert](https://www.anchorterminal.com/people/clemens-rawert/), Co-founder, Langfuse (ClickHouse)
- [Maximilian Deichmann](https://www.anchorterminal.com/people/maximilian-deichmann/), Co-founder, Langfuse (ClickHouse)

## Backed by

- [Y Combinator](https://www.anchorterminal.com/investors/y-combinator/)
- [Lightspeed Venture Partners](https://www.anchorterminal.com/investors/lightspeed-venture-partners/)
- [La Famiglia](https://www.anchorterminal.com/investors/la-famiglia/)

## Questions

### Who is Marc Klingen?

Marc Klingen is co-founder and CEO of Langfuse, the open-source LLM engineering platform from Y Combinator's Winter 2023 batch.

### What does Langfuse (ClickHouse) make?

Anchor Terminal lists Langfuse API + MCP from Langfuse (ClickHouse).

### Who has invested in Langfuse (ClickHouse)?

The sources our research read name Y Combinator, Lightspeed Venture Partners and La Famiglia.

### How are Marc's tools graded?

Langfuse API + MCP is graded BB, 74.8 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://www.ycombinator.com/companies/langfuse
- https://langfuse.com/
- https://langfuse.com/about

These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched.