LangChain
langchain.comObserve, Evaluate, and Deploy Reliable AI Agents
AI Toolsai-agentsllmobservabilityevaluationtracingdeveloper-platformopen-source
About
LangChain offers LangSmith, an agent engineering platform that helps teams build, test, monitor, and deploy AI agents across the full development lifecycle. It provides observability through structured tracing, evaluation tools using human feedback and automated scoring, and deployment infrastructure with memory and fault-tolerant scaling. The platform is framework-agnostic and supports Python, TypeScript, Go, and Java SDKs.
Problem
AI agents are difficult to debug, evaluate, and reliably deploy at scale due to complex branching logic and long-running async behavior.
For
AI engineers and development teams building production AI agents
How it works
LangSmith traces each agent run into a structured timeline, captures production data for evaluation, and provides deployment infrastructure with memory, threading, and durable checkpointing.
Business model
freemium
Status
launched
Company
LangChain