LangChain is an agent engineering platform and open-source AI development framework co-founded by Harrison Chase and Ankush Gola. LangChain's Twitter Score is 155 out of 1000 (an Excellent rating) as of October 2026, ranking #3,567 (top 1%) among 497,421 tracked accounts.
LangChain was co-founded by Harrison Chase and Ankush Gola and is best known for its open-source LLM and AI agent development frameworks, which have surpassed 1 billion cumulative downloads. The platform's product suite centers on LangSmith, an observability and evaluation tool that ingests over 1 billion events per day, and LangGraph, a framework for building stateful agent workflows. LangChain says it works with 35% of the Fortune 500, with Coinbase listed among teams using LangSmith on its official homepage.
LangChain raised a $125 million Series B funding round on October 20, 2025, at a $1.25 billion valuation, per the company's announcement. The round was backed by Benchmark, Sequoia Capital, and IVP. LangChain has accumulated 269,741 followers as of October 2026 and has published 11,920 posts. The account has been mentioned by 300 accounts, with 576 total mentions.
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The accounts that follow LangChain include 856 founders, 196 angel investors, 196 influencers and 13 VCs, among them Toly, 6529, Andrej Karpathy, Smolting Wassie, Udi Wertheimer and Db.