LangChain joined the Unicorn Club on October 20, 2025, after raising a $125 million Series B funding round, marking a significant milestone in its growth as a leading agent engineering platform. Headquartered in San Francisco, California, United States, the company builds the core infrastructure that helps developers create, deploy, and manage AI agents powered by large language models.
Its platform includes LangChain for building LLM workflows, LangGraph for orchestration, and LangSmith for evaluation and monitoring. LangChain is widely used by developers and enterprises building next-generation agentic systems and intelligent applications.
Keep reading to learn how LangChain became a billion-dollar leader in agent engineering.
What Is LangChain and What Does It Do?
Founded in 2022 by Harrison Chase, LangChain began as an open-source framework for developers to build applications with large language models. It later expanded into a complete agent engineering platform that provides tools for building AI agents that can interact with data sources, APIs, and enterprise systems.
The company now offers a suite of products, including LangChain for workflow creation, LangGraph for stateful and long-running agent orchestration, and LangSmith for production monitoring and evaluation. LangChain focuses on enabling enterprises to deploy reliable, auditable, and scalable AI agents.
How Much Funding Has LangChain Raised?
1. Series B Round
- Amount Raised: $125 million
- Date: October 20, 2025
- Valuation: Approximately $1.25 billion post-money
- Lead Investors: IVP
- Purpose: Scale the development of the agent engineering platform and expand enterprise adoption
2. Series A Round
- Amount Raised: $25 million
- Date: February 2024
- Valuation: Approximately $200 million post-money
- Lead Investors: Sequoia Capital
- Purpose: Strengthen the LangSmith platform and expand core engineering
3. Seed Round
- Amount Raised: $10 million
- Date: April 2023
- Lead Investors: Benchmark Capital
- Purpose: Initial development of LangChain and expansion of open source tools
Total Funding Raised: Approximately $160 million
Latest Funding Date: October 20, 2025
Latest Known Valuation: Approximately $1.25 billion
Key Investors
- IVP
- Details: Growth stage venture capital firm investing in technology companies with substantial expansion potential.
- Focus Areas: Enterprise software, AI platforms, cloud infrastructure, and developer tools.
- Sequoia Capital
- Details: Venture capital firm backing high-growth technology companies across early and later stages.
- Focus Areas: AI infrastructure, developer platforms, enterprise applications, and software innovation.
- Benchmark Capital
- Details: Early-stage venture capital firm focused on foundational technology and developer-focused companies.
- Focus Areas: Open source tools, developer ecosystems, early-stage SaaS, and platform infrastructure.
Where Is LangChain’s Headquarters?
LangChain is headquartered in San Francisco, California, United States, and serves as the center for its research, engineering, product development, and operations, supporting its agent engineering platform.
What’s Next for LangChain?
LangChain plans to expand its capabilities across enterprise agent workflows, enhance its LangGraph orchestration system, and improve production monitoring through LangSmith. The company aims to become the core infrastructure layer for organizations building AI agents that operate reliably, securely, and at scale.
With strong investor backing and continued developer adoption, LangChain is positioned to lead the next wave of agent-based AI systems.
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