LangChain announced a $300 million Series C at a $3 billion valuation on November 13, 2026. Its pitch for LangSmith: help companies run AI agents, check their work and control what they can access. Source
Existing investor CapitalG led the round, with participation from new investors GIC and DFJ Growth and existing investors IVP and Sapphire Ventures, according to LangChain. Source
What LangChain means by “owning intelligence”
LangChain frames its mission as enabling every company to “own its intelligence.” That’s a lofty slogan for a fairly concrete proposition: companies should be able to choose their models, control their data and infrastructure, and improve their agents while maintaining rules around how they operate. Model choice is the pitch, not ownership of the models themselves. Source
The company describes LangSmith as framework-agnostic, meaning it isn’t tied to a single agent-building framework. It organizes the platform around three jobs: deploying and running agents; monitoring, testing and improving their behavior; and controlling their access to models, tools and data. Source
LangChain says its controls let teams set model budgets, choose backup models, decide which tools agents can use and manage identity checks for access. Agents, meet the expense policy. Source
LangChain says more than 7,000 organizations already rely on LangSmith, naming Nvidia, Toyota and Salesforce among them. It doesn’t specify how many of those organizations are paying customers. Source
LangChain says it plans to share new LangSmith capabilities on November 20, 2026. It hasn’t detailed those additions or given availability dates in this announcement. The funding news comes with a save-the-date, not the new feature list. Source
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