LangChain
Framework for building LLM-powered applications
About LangChain
LangChain is the most widely used framework for building applications with large language models. It provides composable components for chains, agents, memory, and tool use — along with LangSmith for observability and LangGraph for stateful agentic workflows. Downloaded over 100 million times and used by developers worldwide.
LangChain website preview
Company facts
- Category
- AI
- Funding stage
- Series A
- Total raised
- $35M
- Founded
- 2022
- Team size
- 50–100
- HQ
- San Francisco
- Country
- USA
- Website
- langchain.com
Founders of LangChain
- Harrison Chase
Investors backing LangChain
- Sequoia
- Benchmark
Frequently asked questions
What does LangChain do?
LangChain is the most widely used framework for building applications with large language models. It provides composable components for chains, agents, memory, and tool use — along with LangSmith for observability and LangGraph for stateful agentic workflows. Downloaded over 100 million times and used by developers worldwide.
Where is LangChain based?
LangChain is based in San Francisco, USA.
When was LangChain founded?
LangChain was founded in 2022.
How much has LangChain raised?
LangChain has raised $35M in their Series A round.
Who founded LangChain?
LangChain was founded by Harrison Chase.
Who has invested in LangChain?
LangChain is backed by Sequoia, Benchmark.