LangChain, the startup behind AI agent creation and management software, has closed a $300 million Series C round at a $3 billion valuation, the company announced Friday. CapitalG led the round, with Singapore's GIC, DFJ Growth, IVP, and Sapphire Ventures also participating.

The new valuation is more than double the $1.25 billion the company reached roughly a year ago, when it raised $125 million in a round led by IVP.

LangChain started in 2022 as an open source project built to handle tasks early LLMs struggled with, such as web search, API calls, and database interactions. As frontier AI labs shipped tools that could handle those jobs competently, LangChain shifted its attention to managing AI agents. Its pitch: let businesses own their own intelligence.

The company says its LangSmith software, built on those open source roots, avoids locking users into a particular model, cloud, or ecosystem, unlike major clouds and frontier labs. It also promises contained agent behavior and ease of use.

Competitors are chasing similar advantages, including newcomer Mintive, but LangChain claims an early lead and 7,000 LangSmith customers, among them startups Harvey, Rippling, and Clay, plus enterprises Nvidia, Toyota, and Salesforce.

Source: TechCrunch