Langfuse

Open Source👨‍💻 coding

Open-source LLM observability platform for tracing, prompt management, evaluation, and metrics.

👨‍💻Categorycoding

🆓PricingOpen Source

About

Langfuse is an open-source AI engineering platform that provides full observability into LLM applications and agents through hierarchical traces, prompt management, evaluation pipelines, and cost/latency dashboards. It supports any model or framework via OpenTelemetry and offers 80+ integrations with popular agent frameworks and model providers. Teams can run LLM-as-a-judge evaluations, manage prompts with one-click deployments, and run experiments to continuously improve production AI systems. It can be self-hosted or used as a cloud service, and is trusted by over 100,000 engineers including teams at Fortune 50 companies.