# LangChain

> LangChain is the agent engineering company. It builds the open-source frameworks (LangChain, LangGraph) and the commercial platform (LangSmith, LangGraph Platform) that developers use to design, deploy, evaluate and observe LLM-powered applications and autonomous agents in production.

- **Founded:** 2022
- **Headquarters:** San Francisco, California, United States
- **Founders:** Harrison Chase (Co-founder & CEO), Ankush Gola (Co-founder & CTO)
- **Team size:** ~98 employees
- **Products:** LangChain, LangGraph, LangSmith, LangGraph Platform
- **Notable:** Joined the unicorn club in October 2025 at a $1.25B valuation., LangChain repo crossed 100k+ GitHub stars - one of the most-starred AI projects ever., Hosted Interrupt, the first dedicated agent-engineering conference, in 2025.

## Products & services

- **LangChain** — Open-source Python and JavaScript framework for composing LLM applications - prompts, models, retrievers, tools and memory.
- **LangGraph** — MIT-licensed orchestration framework for building stateful, multi-actor, long-running agentic workflows with human-in-the-loop control.
- **LangSmith** — Unified observability, evaluation and prompt-engineering platform for LLM apps - whether or not they use LangChain.
- **LangGraph Platform** — Managed cloud and self-hosted infrastructure for deploying, scaling and versioning agents built with LangGraph.

## Achievements

- Joined the unicorn club in October 2025 at a $1.25B valuation.
- LangChain repo crossed 100k+ GitHub stars - one of the most-starred AI projects ever.
- Hosted Interrupt, the first dedicated agent-engineering conference, in 2025.
- Klarna case study: 80% reduction in case resolution time using LangSmith.
- C.H. Robinson automating 5,500 freight orders per day on LangSmith.

## Latest updates

- **2025-10** — Closed $125M Series B led by IVP at a $1.25B valuation.
- **2025-05** — LangGraph Platform reaches general availability.
- **2025-01** — LangSmith hits 1,000+ paying customers.
- **2024-10** — LangChain turns two; rewrites core abstractions for v0.3.

## Links

- Website: https://www.langchain.com
- LinkedIn: https://www.linkedin.com/company/langchain
- Twitter/X: https://twitter.com/LangChainAI
- GitHub: https://github.com/langchain-ai
- YouTube: https://www.youtube.com/@LangChain

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Profile page: https://yespress.io/langchain
Published by YesPress — https://yespress.io
Last updated: 2026-05-19