# Harrison Chase

> Harrison Chase is the co-founder and CEO of LangChain, the open-source framework that became the default scaffolding for developers building LLM-powered applications. Starting as an 800-line Python package he wrote as a side project in October 2022, LangChain has grown to serve 1 million+ developers, 80 million monthly downloads, and blue-chip enterprise customers from Uber to JPMorgan - reaching a $1.25 billion valuation after a $125 million Series B in October 2025. A Harvard-trained statistician who got into machine learning through sports analytics, Chase built LangChain to solve the problem he kept running into at work: there was no good way to chain LLM calls together into reliable, production-ready applications.

- **Role:** Co-Founder and CEO at LangChain
- **Organizations:** LangChain, Robust Intelligence, Kensho Technologies
- **Nationality:** American
- **Education:** BA in Statistics and Computer Science, Harvard University
- **Known for:** Founded LangChain, the most widely adopted open-source LLM framework, now with 80 million monthly downloads, Grew LangChain to 1 million+ developers worldwide in under three years, Raised $260M total funding, reaching $1.25 billion valuation with Series B in October 2025

## Career timeline

- **2013** — Enrolled at Harvard University, studying statistics and computer science; began exploring sports analytics
- **2017** — Graduated Harvard; joined Kensho Technologies (fintech) as Machine Learning Engineer
- **2017-2019** — At Kensho, led the entity linking team connecting disparate data into actionable insights; worked on timeseries, text, and sports data projects
- **2019** — Joined Robust Intelligence as ML engineer, eventually leading the machine learning team focused on model testing and validation
- **2022-10** — Released LangChain's first version as an 800-line Python package on GitHub while still at Robust Intelligence; initially a side project exploring LLM orchestration
- **2022-11** — ChatGPT launched and dramatically accelerated LangChain adoption
- **2023-02** — Incorporated LangChain as a company with co-founder Ankush Gola; raised early funding including Sequoia and Benchmark
- **2023-07** — Launched LangSmith beta - a cloud-based monitoring and evaluation platform for LLM applications
- **2024-01** — Released LangGraph - a framework for building controllable, stateful multi-agent systems in production
- **2025-10** — Released LangChain 1.0; announced $125M Series B at $1.25B valuation led by IVP; LangChain joins the unicorn club

## Achievements

- Founded LangChain, the most widely adopted open-source LLM framework, now with 80 million monthly downloads
- Grew LangChain to 1 million+ developers worldwide in under three years
- Raised $260M total funding, reaching $1.25 billion valuation with Series B in October 2025
- Built LangSmith into a comprehensive Agent Engineering Platform used by major enterprises
- LangGraph adopted by enterprises including Rippling, Cloudflare, Replit, Harvey, LinkedIn, Uber, JPMorgan, and BlackRock
- Named to BigDATAwire People to Watch 2024
- Speaker at TED AI San Francisco, Sequoia Capital Training Data podcast, and major AI conferences
- LangChain repository became one of the fastest-growing open-source AI projects ever

## Latest updates

- **2025-10** — LangChain closed $125M Series B at $1.25B valuation led by IVP, with participation from CapitalG, Sapphire, Sequoia, Benchmark, and Amplify Partners, plus strategic investors ServiceNow, Workday, Cisco, Datadog, and Databricks.
- **2025-10** — Released LangChain 1.0 - a major curated release representing the most polished version of the framework to date.
- **2025-10** — LangSmith evolved into a full Agent Engineering Platform.
- **2024-01** — Released LangGraph, focusing on controllability, statefulness, and production runtime for multi-agent systems.

## Links

- Website: https://langchain.com
- LinkedIn: http://www.linkedin.com/in/harrison-chase-961287118
- Twitter/X: https://twitter.com/hwchase17
- GitHub: https://github.com/hwchase17

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Profile page: https://yespress.io/harrison-chase
Published by YesPress — https://yespress.io
Last updated: 2026-05-12