About LangChain
LangChain is the most popular open-source framework for building applications powered by large language models. With over 90,000 GitHub stars, LangChain provides abstractions for chains, agents, memory, and retrieval that dramatically accelerate LLM application development. LangGraph enables stateful multi-agent workflows, while LangSmith provides observability and evaluation — forming the complete stack for production AI applications.
NeuronScore
Agent-Ready
MCP
Public API
Webhooks
OAuth2
SDK · TS
SDK · Py
SDKs: PythonTypeScriptGoJava
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FAQ
When was LangChain founded?
LangChain was founded in 2022 in San Francisco, United States.
How much funding has LangChain raised?
LangChain has raised $35M across 1 rounds — most recently a Seed.
What is LangChain's valuation?
Most recent disclosed valuation is $200M.
How much does LangChain cost?
LangChain pricing: Freemium · From $39/mo.
Where is LangChain headquartered?
LangChain is headquartered in San Francisco, United States.
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