
The standard LLM framework — build, test, deploy agents with LangSmith observability and evaluation
langchain.comWhat do you think about LangChain?
LangChain is the standard framework for building LLM applications, paired with LangSmith for observability, evaluation, and monitoring. Powers top engineering teams from AI startups to global enterprises. Full agent engineering lifecycle: build, test, deploy, learn, repeat. Free plan includes 5,000 traces per month.