LangChain Raises $300 Million at $3 Billion Valuation, Led by CapitalG with MongoDB Arm Participating
Key Facts
LangChain raised $300 million in a round involving MongoDB Ventures, Benzinga reported via Fidelity on November 13, 2026. CapitalG led the round, which lifted the company’s post-money valuation to $3 billion, according to Axios. GIC and DFJ Growth joined the investors, alongside existing backers IVP and Sapphire Ventures. LangChain develops tools for engineering AI agents, software that performs tasks using connected models, data and tools. The round places the company among software infrastructure providers seeking to turn model capabilities into applications for enterprise use.
The size and valuation of the round mark a jump from LangChain’s previous funding. On October 20, 2025, the company announced it had raised $125 million at a valuation of $1.25 billion. IVP led that round, joined by existing investors Sequoia, Benchmark and Amplify, as well as CapitalG and Sapphire Ventures, which were new investors at the time. The valuation announced in the November 2026 round was therefore more than double that of the previous round. CapitalG and Sapphire Ventures had entered the company’s investor roster in the previous round before participating in the new financing in different roles.
LangChain offers its products through the open-source LangChain and LangGraph frameworks, and LangSmith tools for monitoring, evaluating and deploying agents. In October 2025, the company said the two frameworks had recorded a combined 90 million monthly downloads and that its services were used by 35% of Fortune 500 companies. It added that monthly trace volume on the commercial LangSmith platform had increased 12 times year over year at the time. In March 2026, it said its frameworks had surpassed 1 billion cumulative downloads and were used by more than 1 million practitioners. It also said LangSmith serves more than 300 enterprise customers and had processed more than 15 billion traces and 100 trillion tokens.
LangChain’s partnership with MongoDB, announced in March 2026, provides direct context for the participation of the company’s investment arm in the round. LangChain said integrations between its products and MongoDB Atlas include vector search, persistent memory for agents and natural-language data access. The partnership also includes tools to monitor and deploy agents while preserving their state. The company described the integrations as turning Atlas into a complete backend infrastructure for AI agents. LangChain said more than 65,000 customers run applications critical to their businesses on Atlas, according to its announcement in March 2026.
MongoDB shares closed at $339.78 in the November 12, 2026 session, according to EL7 data. The investment links the database company with a platform developing tools to build and monitor agents, as LangChain expands its product suite for developers and companies. Available data do not include a documented share price during the session or an explanation from MongoDB for its investment arm’s participation. The key announced terms of the round remain the $300 million in funding and a post-money valuation of $3 billion, with CapitalG leading and existing and new investors participating.