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YC W23Acquired

Langfuse

Open source LLM engineering platform

About

Traces, evals, prompt management and metrics to debug and improve your LLM application. Onboard via https://langfuse.com Langfuse helps you build and improve LLM applications across the entire lifecycle: - Develop: Observability, Langfuse UI & Prompt Management - Monitor: Traces, Analytics, Metrics & Evaluations - Test: Experiments, Releases & Datasets We are hiring: https://langfuse.com/careers Langfuse was acquired by Clickhouse in January of 2026.

Founders

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Industry & Focus

B2BEngineering, Product and DesignArtificial IntelligenceDeveloper ToolsGenerative AIAnalyticsOpen Source