Overview

LangChain is a leading platform for agent engineering founded in October 2022 by Harrison Chase and Ankush Gola. The company’s mission is to make AI agents as reliable as databases and APIs. LangChain began as an open-source framework to simplify LLM application development and has evolved into a comprehensive ecosystem with 90+ million monthly downloads and adoption by 35% of Fortune 500 companies. As of October 2025, LangChain has achieved unicorn status with a $1.25 billion valuation following a $125 million Series B funding round led by IVP. With over 118,000 GitHub stars and customers including Replit, Clay, Harvey, Rippling, Cisco, and Workday, LangChain powers the next generation of AI applications.

Products & Technology

• LangChain Framework: Open-source Python/TypeScript framework with pre-built architectures and 100+ model integrations.
• LangGraph: Open-source framework for building custom, stateful agent workflows with low-level orchestration.
• LangSmith: Commercial platform for observability, tracing, debugging, and evaluation of AI agents.
• LangGraph Platform: Managed infrastructure for deploying long-running, stateful AI agents.
• Agent Builder: No-code text-to-agent builder for business users (private preview).
• Insights Agent: Automated categorization of agent behavior patterns in LangSmith.

2024-2025 Highlights

• Achieved unicorn status with $1.25B valuation (Oct 2025).
• Raised $125M Series B led by IVP (Oct 2025).
• Launched LangChain 1.0 and LangGraph 1.0 with major stability improvements.
• LangGraph Platform reached general availability (May 2025).
• Reached 90M+ monthly combined downloads of LangChain and LangGraph.
• 35% of Fortune 500 companies now use LangChain services.
• 12x year-over-year growth in LangSmith monthly trace volume.
• Added enterprise customers: Cisco, Workday, Cloudflare, Klarna, Rippling.

Funding Rounds