LangChain raises $300 million at $3 billion valuationLangChain, which makes a platform for developers building AI applications and agents, raised $300 million at a $3 billion valuation, more than doubling its previous valuation.Nov 12, 2026·2 sourcesAI agentsVenture capital fundingDeep agentsAlphabet Inc.AI developer toolsAI companies founding roundsMulti-agent orchestrationAI startupsAI investmentOpen-source AI00