Today we’re excited to announce new funding for LangChain (at a $1.25B valuation) to allow us to build the platform for agent engineering. LangChain started as a single Python package 3 years ago. Since then, we’ve evolved into a comprehensive platform for agent engineering (LangGraph, LangSmith). Our tools now power AI teams like @Replit , @clay , @harvey , @TrustVanta , @Cloudflare , @Rippling , @Cisco , @Workday , and many more. Over the past three years we’ve iterated from LangChain to…