LangChain

Agent engineering platform and open source frameworks for building AI agents, including LangChain, LangGraph, deepagents, and the LangSmith platform.

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About

LangChain builds an agent development platform alongside open source frameworks for building AI agents. The company frames the work as helping teams observe, evaluate, and deploy reliable AI agents.

LangSmith is the central agent engineering platform, covering tracing and debugging, evaluation with human review and automated scoring, deployment infrastructure with async collaboration, and monitoring across the agent development lifecycle. It is framework agnostic, with SDKs for Python, TypeScript, Go, and Java. LangSmith Engine surfaces and diagnoses undetected issues autonomously, and LangSmith Fleet targets routine company wide tasks described in plain language.

The open source side covers LangChain for starting agents against any model provider, LangGraph for building reliable agents with low level control, and deepagents for long running agents on complex tasks.

Featured reads

ChatGPT Has the Users. Claude Has the Job Posts.

Among 867 hiring tech companies, 169 name Claude in their job posts, 135 name OpenAI, and 80 name Gemini. Open-weight models show up at 8. The consumer ranking, inverted.

Tech Job Market Report: July 2026

Snapshot of the July 2026 tech job market on Remoet: where the open roles are, who's hiring most, what techs pay, and which benefits show up most often.