LangChain raises $300M at $3B valuation led by CapitalG

LangChain's Series C arrives as the company is positioning its LangSmith platform around a specific thesis: that AI agents will transform the economy, and that the companies controlling these systems will build lasting competitive advantages. The round, led by existing investor CapitalG with new money from GIC and DFJ Growth, adds fresh backers alongside returning investors IVP and Sapphire Ventures.

The company argues that every company will need to own its intelligence—choosing the best models for its needs, controlling its data and infrastructure, and continuously improving agents while maintaining governance to operate securely at scale. LangSmith is the framework-agnostic platform LangChain has built to run, improve, and govern agents, organized around three pillars: Agent Runtime, Agent Improvement, and Agent Governance. The company says building high-performing agents is harder than it should be, and that this funding will help it make that work easier for every company.

Beyond the capital, LangChain has scheduled a release event for Friday, November 20th, where it says it will share several new LangSmith capabilities building on this foundation. New and existing investors named in the announcement include Salesforce Ventures, Insight Venture Partners, QuantumLight, and MongoDB Ventures, alongside Sequoia, Amplify, and Benchmark, which the company says doubled down in the round.