open-source

Name: open-source (MIT) LLM observability platform: SDK/API trace + span ingestion for LLM apps and agents, prompt management, LLM-as-judge evals and dataset experiments, metered in 'units' (50k free/mo, 100k included on paid tiers), run as managed cloud (US/EU/Japan/HIPAA-US data regions) or self-hosted via Docker Compose/Kubernetes
Creator: Langfuse
License: MIT License

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open-source (MIT) LLM observability platform: SDK/API trace + span ingestion for LLM apps and agents, prompt management, LLM-as-judge evals and dataset experiments, metered in 'units' (50k free/mo, 100k included on paid tiers), run as managed cloud (US/EU/Japan/HIPAA-US data regions) or self-hosted via Docker Compose/Kubernetes

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Industry: Application SoftwareSystems SoftwareInternet Services & Infrastructure
Categories: LLM engineering and observability platform (open source, self-hostable)