Langfuse
Open Source LLM Engineering Platform to debug and improve AI applications.

Langfuse is an open-source LLM engineering platform that provides tracing, prompt management, evaluations, and metrics to help developers build and improve AI applications and agents. It integrates with any model or framework via OpenTelemetry and supports 80+ integrations. Teams can self-host or use the cloud version to monitor production workloads at enterprise scale.
Langfuse instruments LLM calls via OpenTelemetry to capture traces, then provides a unified platform for observability, prompt management, evaluations, and experiments to power a continuous improvement loop.
AI/ML engineers and development teams building LLM applications and agents
Background.
- Status
- launched
- Business model
- freemium
- Company
- Langfuse
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