Harrison Chase

Harrison Chase is the co-founder and chief executive of LangChain. He started the open-source LangChain project in 2022 while working as a machine-learning engineer, then joined with Ankush Gola to establish the company in early 2023. His work focuses on the software layer between language models and the applications built around them.

LangChain introduced abstractions for connecting model calls with prompts, retrieved information, and external tools. This helped developers experiment with applications that needed more than an isolated text-generation request. The project’s surrounding ecosystem also includes software for observing and evaluating model-driven applications.

The company later developed LangGraph to give developers more explicit control over complex agent workflows and their execution. Chase’s contribution is primarily application infrastructure, rather than training a foundation model. His work addresses the practical problems that appear when a model must interact with other software, maintain state, and complete a sequence of tasks in a system that developers can inspect and improve.