The open-source, local-first alternative to LangSmith. No cloud. No setup.
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Updated
May 12, 2026 - Python
The open-source, local-first alternative to LangSmith. No cloud. No setup.
Drop-in observability for LLM apps — quality scoring, hallucination detection, cost tracking and agent debugging
Self-hosted observability and debugging platform for AI agents with traces, execution DAGs, cost analytics, latency stats, and live events.
This repo contains detailed notes on LangSmith concepts including traces, runs, observability, and integrations with LangChain, RAG, and LangGraph.
See every prompt, every trace, every dollar.
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