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Winner • AI Infra Product of the Year

What is Langfuse?

Langfuse is the open source LLM Engineering Platform. It provides observability, metrics, evals, prompt management and a playground and to debug and improve LLM apps. Langfuse is open. It works with any model, any framework, allows for complex nesting and has open APIs to build downstream use cases. Docs: langfuse.com/docs Github: github.com/langfuse/langfuse

AI Metrics and Evaluation

Maker shoutouts

Draft Alpha — The ultimate AI assistant for content creators.

492 upvotes

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5d ago

"Thanks for the generous free tier and excellent LLM observability 🙌 "

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Lamatic.ai — Build AI agents in low-code & deploy on edge

486 upvotes

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1mo ago

"we’re excited to provide a Langfuse integration platform so others can seamlessly view their telemetry in Langfuse! With Langfuse’s robust telemetry and our smooth integration, users gain deep insights into their data, making it easier to track, analyze, and optimize performance."

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OpenFunnel — Personalised Agents for AI-First GTM Teams

180 upvotes

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11d ago

"LLM observability platform that just works!"

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Truva AI — Sell more and grind less with AI agents

438 upvotes

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2mo ago

"Helping us stay on top off our AI agents."

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Recent launches

Langfuse Prompt Experiments

Langfuse is the #1 open source LLM engineering platform. It helps teams iterate on and improve their LLM applications: LLM tracing, metrics, llm-as-a-judge, evaluations, prompt management, datasets testing and more. Create a free account or self-host Langfuse.

29d ago

Langfuse 2.0

Langfuse is the open source LLM Engineering Platform. It provides observability, tracing, evaluations, prompt management, playground and metrics to debug and improve LLM apps. Langfuse is open. It works with any model, framework and you can export all data.

8mo ago

1 more launch