LangChain has raised $300 million in a Series C round led by CapitalG, valuing the company at $3 billion after the investment. The figure, up from $1.25 billion in October 2025, represents a 2.4-fold increase in roughly one year, bringing its total disclosed funding to approximately $460 million. More than 7,000 organizations now use LangSmith, a model-agnostic platform for building, monitoring and governing AI agents. Customers include NVIDIA, Toyota, Salesforce and Workday, and the platform reportedly processes more than 1 billion events per day; at Workday, it reportedly reduced the deployment time for a new agent from five months to one day. LangChain plans to use the proceeds to expand LangSmith and increase its workforce from 435 to 850 employees by the end of 2027.
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