Langfuse is an open source LLM engineering platform. It helps teams collaboratively develop, monitor, evaluate, and debug AI applications. Langfuse can be self-hosted in minutes and is battle-tested. Proudly made with ClickHouse open source database.
🪢 Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform.
Trace Claude Code AI coding assistant conversations, user inputs, and tool usage with Langfuse for comprehensive observability.
Trace OpenAI Codex CLI coding sessions, agent turns, tool calls, token usage, and subagents with Langfuse for comprehensive observability.
🪢 Langfuse Python SDK (v4, OpenTelemetry). Tracing: get_client() / start_as_current_observation — not the legacy Langfuse().trace() client.
End-to-end Langfuse workshop using a TypeScript Agent to teach the AI engineering loop: tracing, prompt management, monitoring, datasets, experiments, and evaluation.
🪢 Langfuse JS/TS SDKs - Instrument your LLM app and get detailed tracing/observability. Works with any LLM or framework
