AI developer platform LangChain has secured $125 million in new funding at a $1.25 billion valuation, officially cementing its unicorn status. The deal, led by IVP, also drew participation from new investors CapitalG and Sapphire Ventures, alongside returning backers Sequoia, Benchmark, and Amplify. Reports earlier in the year indicated the company was already on track for a valuation of at least $1 billion.
Founded in 2022 by machine learning engineer Harrison Chase, LangChain quickly became a breakout open source framework for building AI agents. It gained early popularity by helping developers solve challenges in working with large language models, including web search, API calls, and database interactions. Its rapid rise attracted major investor interest, with the company raising a $10 million seed round from Benchmark and a $25 million Series A led by Sequoia in 2023.
As AI models have grown more advanced, LangChain has transitioned into a full platform for building autonomous agents. Alongside its funding announcement, the company rolled out updates across its core tools: the LangChain agent builder, orchestration and memory framework LangGraph, and testing and observability platform LangSmith.
The project remains one of the most prominent in the open source AI community, boasting 118,000 GitHub stars and over 19,000 forks. With fresh capital and an expanding product suite, LangChain says it plans to accelerate innovation for developers building the next generation of AI-powered applications.