LangSmith is a platform for building production-grade LLM applications.
It lets you debug, test, evaluate, and monitor chains and intelligent agents built on any LLM framework and seamlessly integrates with LangChain, the go-to open source framework for building with LLMs.

LangSmith is developed by LangChain, the company behind the open source LangChain framework.
github: https://github.com/krishnaik06/Langsmith