Why LangChain matters
LangChain raises a $125M Series B at a $1.25B valuation led by IVP on October 20, 2025, with Sequoia, Benchmark, CapitalG and ServiceNow Ventures participating; total funding reaches $260M. Its main GitHub repository shows 146,700 stars as of September 2026. The company sells LangSmith for tracing and evaluating agents and LangGraph for building stateful multi-step agents, alongside its Deep Agents package.
The numberRaised $125M Series B at a $1.25B valuation led by IVP on October 20, 2025
On The Agentic 80
Listed under Agent frameworks and infrastructure. What agents are built on: orchestration, tools, memory, evals, sandboxes.
On The All Things AI 100
Listed under Model platforms and developer tools. Where models are hosted, served, and turned into applications.
Quick answers
- What does LangChain do?
- Open source agent framework plus LangGraph orchestration and LangSmith observability tools. LangChain raises a $125M Series B at a $1.25B valuation led by IVP on October 20, 2025, with Sequoia, Benchmark, CapitalG and ServiceNow Ventures participating; total funding reaches $260M.
- What AI capabilities does LangChain offer?
- LangChain provides an open source framework for building applications that call language models, tools, and retrieval over company data. LangGraph orchestrates stateful, multi-step agent workflows, and LangSmith traces runs, evaluates outputs, and monitors deployed agents. Developers use these products to connect models to internal systems and to test and observe agents before and after release.
- Why is LangChain on The Agentic 80?
- LangChain is listed under Agent frameworks and infrastructure. What agents are built on: orchestration, tools, memory, evals, sandboxes. Raised $125M Series B at a $1.25B valuation led by IVP on October 20, 2025.
- Why is LangChain on The All Things AI 100?
- LangChain is listed under Model platforms and developer tools. Where models are hosted, served, and turned into applications. Raised $125M Series B at a $1.25B valuation led by IVP on October 20, 2025.
- Where is LangChain based, and who owns it?
- LangChain is based in San Francisco, CA, was founded in 2022 and is private, Series B.