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

Do you use Langfuse?

Recent Launches

Langfuse Prompt Experiments Open Source LLM Engineering Platform

Launched on November 22nd, 2024

Langfuse 2.0 the open source LLM engineering platform

Launched on April 26th, 2024

Langfuse Open source tracing and analytics for LLM applications

Launched on August 20th, 2023

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Review Langfuse?

5/5 based on 30 reviews

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Maker reviews

Nadeesha Cabral used this to build

Inferable

(105 points)

Langfuse is the easiest way to add observability to your AI stack. We use Langfuse ourselves, and have a native integration for our customers to push their spans to Langfuse as well.

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6d ago

Nitesh Sharma used this to build

Draft Alpha

(466 points)

Thanks for the generous free tier and excellent LLM observability 🙌

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2mo ago

flo merian used this to build

Lamatic.ai

(478 points)

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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3mo ago

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Reviews

Rajtilak Bhattacharjee

•50 reviews

Awesome!!! First, congratulations on the launch. Making LLM apps cost-effective is one of the priorities for the service that I am working on. This should help. Just a quick question, can this be used in tandem with Langsmith?

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1yr ago

Nikhil Kulkarni

•4 reviews

We use Langfuse to monitor our GPT usage - specifically to watch for token usage, monitor hallucinations, and trace through request history when things go wrong. Great product and even greater team! Highly recommend trying Langfuse!

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1yr ago

David

Droplet

•4 reviews

So excited to see Langfuse go live — we've been a happy user for 4 weeks now. Most detailed latency and analytics in the market. Highly recommend for anyone using complex chains or with user-facing chat applications, where latency becomes crucial. Congrats, Clemens, Marc, and Max!

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1yr ago

Collin Schneider

•1 review

This is awesome, congrats on the launch guys! LLMs always felt like such a black box for me, Langfuse seems to address these concerns. This is a huge win for the LLM space in general, I'm super excited to build on it!

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1yr ago

Ishwar Jha

•37 reviews

This looks absolutely brilliant idea to track and stay informed about the performance of LLM applications. I am in the process of building one and certainly give it a try to measure my LLM app.

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1yr ago

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