Founded in 2022 by machine-learning engineer Harrison Chase, LangChain started as an open source project that simplified tasks such as web search, API calls, and database interactions for early LLM applications. Its flagship framework has since evolved into a broader platform for building full-fledged AI agents, supported by products like the agent builder LangChain, the orchestration and memory tool LangGraph, and the testing and observability suite LangSmith. The project enjoys strong developer adoption, boasting roughly 118,000 GitHub stars and 19.4K forks. Recent product updates were released alongside its latest fundraise, signaling continued investment in tooling and infrastructure for agentic applications. Although revenue figures have not been disclosed, the company’s rapid uptake and expanding ecosystem highlight significant market traction. With fresh capital and a $1.25 billion valuation, LangChain plans to deepen its platform capabilities and maintain its position as a core layer in the AI developer stack.

Total raised

$150M

Funding rounds

2

Latest round

Series B

Latest activity

Oct 2025