Launch HN: Langfuse (YC W23) – OSS Tracing and Workflows to Improve LLM Apps

Hey HN, we are Marc, Clemens, and Max – the founders of Langfuse. Langfuse leverages traces, evaluations, prompt management, and metrics to help developers debug and improve LLM applications. Here is a full walkthrough: https://www.youtube.com/watch?v=2E8iTvGo9Hs With Langfuse, you can instrument your app and start ingesting traces, thereby tracking LLM calls and other relevant logic in your app such as retrieval, embedding, or agent actions. Langfuse then helps to analyze traces and use features such as evaluations or prompt management to make improvements to your app. You can sign up to try Langfuse Cloud ( https://cloud.langfuse.com/ – we have a generous free tier) or self-host Langfuse ( https://langfuse.com/self-hosting ) within a couple of minutes. In the 15 months since our “Show HN” ( https://news.ycombinator.com/item?id=37310070 ), thousands of teams adopted the project (including teams like KhanAcademy, Twilio, and S