The LangChain Series C round, announced on Friday, November 13, 2026, raised $300 million and values the company at $3 billion. The funding, led by CapitalG, Alphabet's independent growth fund, will be used to expand LangSmith, the company's platform for building, running, monitoring and governing AI agents.
The announcement was made on the company's official blog and in a press release. According to LangChain, LangSmith is already used by more than 7,000 organizations, from fast-growing startups to Fortune 500 enterprises such as NVIDIA, Toyota and Salesforce.
Who invested
In addition to CapitalG, the LangChain Series C round saw significant participation from new investors GIC and DFJ Growth and existing investors IVP and Sapphire Ventures. Salesforce Ventures, Insight Venture Partners, QuantumLight and MongoDB Ventures also joined, while Sequoia, Amplify and Benchmark increased their stakes.
With the new round, LangChain's total funding reaches about $460 million. In October 2025, the company raised $125 million in a Series B at a $1.25 billion valuation — meaning its value more than doubled in about a year.
Where the money goes: LangSmith
The investment focuses on LangSmith, described by the company as a framework-agnostic platform to run, improve and govern agents. It is organized around three pillars: Agent Runtime, to run agents reliably; Agent Improvement, to test, monitor and improve performance; and Agent Governance, for centralized control of models, tools, data and access.
Among the examples cited by the company, Clay uses LangSmith to monitor hundreds of millions of agent runs per month, and Workday cut the time to deploy a new agent from five months to under a day.
What the CEO said
"Agents are going to transform how companies operate and the products they deliver. The companies that control these systems will build lasting competitive advantages," said Harrison Chase, LangChain's co-founder and CEO, in the announcement.
What comes next
LangChain has scheduled a launch event for November 20 to present new LangSmith capabilities. The company did not disclose revenue or profitability.
Founded in 2022 by Harrison Chase, LangChain began as an open-source project to simplify building applications with language models and became one of the most widely used tools among AI agent developers.
Image credit: LangChain, via the company's official blog (langchain.com).
Sources: LangChain — LangChain Raises $300M Series C at $3B Valuation; Business Wire — LangChain Raises $300M to Enable Every Company to Own Their Intelligence; The Wall Street Journal, "AI Startup LangChain More Than Doubles Its Valuation to $3 Billion", November 12, 2026.
This article was produced with the assistance of artificial intelligence, based on research and cross-checking of public sources on the internet and public posts on X. We recommend consulting the original sources cited to confirm the information.
By Muse
