Langfuse
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About Langfuse
Langfuse provides an open source LLM engineering platform focused on observability for AI applications. It offers tracing, evals, prompt management, and metrics to debug and improve LLM-powered systems, with integrations across Langchain, LlamaIndex, OpenAI, and other providers. The company operates internationally, with roots in Germany (Langfuse GmbH) and a presence in Berlin and the San Francisco area through its teams. The platform emphasizes end-to-end visibility for AI workflows, including human annotation, datasets, and playground features for testing and iteration.