# Langfuse

> An open-source LLM engineering platform for tracing, evaluation, prompt management and debugging.

## Facts
- **Category:** [Agent Infrastructure](https://agentsearchengine.app/category/agent-infrastructure)
- **Type:** Infrastructure
- **Pricing:** Open source
- **GitHub stars:** 34,954
- **Language:** TypeScript
- **License:** MIT
- **Last repo activity:** today (Sep 23, 2026)
- **Official site:** https://langfuse.com
- **Source code:** https://github.com/langfuse/langfuse
- **Listing on Agent Search Engine:** https://agentsearchengine.app/agents/langfuse
- **Data verified:** September 2026

## Best for
Teams that want production-grade, self-hostable tracing and evals for LLM apps.

## About Langfuse
Langfuse helps teams develop, monitor, evaluate and debug AI applications: it ingests traces of LLM calls, retrieval, embeddings and agent actions, runs evaluations, manages prompts and datasets, and integrates with the major LLM SDKs and frameworks. It can be self-hosted or used as Langfuse Cloud, and has been part of ClickHouse since January 2026. Most of the code is MIT-licensed; enterprise directories carry a separate licence.

## Install

```
pip install langfuse
```

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