LangChain, which aims to help large companies build and deploy their own AI agents, raised $300M led by CapitalG at a $3B valuation, up from $1.25B in 2025 (Belle Lin/Wall Street Journal)

https://www.wsj.com/cio-journal/ai-startup-langchain-more-than-doubles-its-valuation-to-3-billion-f83377ad
http://www.techmeme.com/261112/p35#a261112p35