# Langfuse

**Category:** Model Evaluation & Benchmarking
**Website:** https://langfuse.com
**GitHub:** https://github.com/langfuse/langfuse
**Pricing:** Open Source
**Listing status:** radar
**Canonical:** https://aicompliance.ai/tools/langfuse


## Summary

Open-source LLM engineering platform (YC W23, MIT license): tracing, LLM-as-judge evals, prompt management, and datasets — the most widely adopted OSS option; part of ClickHouse since Jan 2026.

## TL;DR

- Langfuse — Open-source LLM engineering platform (YC W23, MIT license): tracing, LLM-as-judge evals, prompt management, and datasets — the most widely adopted OSS option; part of ClickHouse since Jan 2026.
- Category: Model Evaluation & Benchmarking.
- Pricing model: Open Source.
- Open-source code available on GitHub.

## Core features

- Open-source LLM engineering platform (YC W23, MIT license): tracing, LLM-as-judge evals, prompt management, and datasets — the most widely adopted OSS option; part of ClickHouse since Jan 2026.

## FAQ

### What is Langfuse?

Open-source LLM engineering platform (YC W23, MIT license): tracing, LLM-as-judge evals, prompt management, and datasets — the most widely adopted OSS option; part of ClickHouse since Jan 2026.

### Does Langfuse have compliance certifications?

Langfuse does not publicly list specific compliance frameworks in our directory. Confirm the latest posture directly with the vendor at https://langfuse.com.

### How much does Langfuse cost?

Langfuse is open source, so you can self-host it for free. Managed/cloud tiers may be offered separately.

### Who is Langfuse for?

Teams working on model evaluation & benchmarking — particularly those that need to evidence AI compliance and security controls.

### Is Langfuse open source?

Yes — the source code is available on GitHub at https://github.com/langfuse/langfuse.


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Canonical HTML page: https://aicompliance.ai/tools/langfuse
Source: AI Compliance Index (https://aicompliance.ai)