COMPANIES · AI INFRA SOFTWARE
LangChain
LangChain is a private company that develops open-source software frameworks (LangChain and LangGraph) and a companion paid platform (LangSmith) that developers use to build, test and monitor AI applications built on large language models.
LangChain is a private company that develops open-source software frameworks (LangChain and LangGraph) and a companion paid platform (LangSmith) that developers use to build, test and monitor AI applications built on large language models.
LangChain raised $125 million in a Series B round in October 2025 that valued the company at $1.25 billion, reflecting demand for tooling that helps developers build AI agents on top of models from providers such as OpenAI and Anthropic.
LangChain makes money by selling subscriptions to LangSmith, its paid platform for monitoring, testing and managing AI applications, while its core LangChain and LangGraph frameworks remain open source.
United States (San Francisco, California)
AI infrastructure software. The tools developers use to build, train, deploy and manage AI systems: the software layer that sits between raw computing power and a finished AI product.
Same-layer peers share an editorial stack classification; that alone does not establish direct competition.
Connections (2)
Every connection below is tied to a readable source, date, classification and statement of its limits. A company source establishes what that company stated; it does not necessarily provide independent confirmation.
Current relationships (2)
Source: Source undated · reviewed 2026-09-20
Evidence: Primary-source statement · Reported operating
Limits: This confirms LangChain's software supports calling OpenAI models; it does not establish a commercial or investment relationship between the two companies, or that OpenAI endorses or sponsors LangChain.
Model providers - Docs by LangChain ↗Source: Source undated · reviewed 2026-09-20
Evidence: Primary-source statement · Reported operating
Limits: This confirms LangChain's software supports calling Anthropic models; it does not establish a commercial or investment relationship between the two companies, or that Anthropic endorses or sponsors LangChain.
AnthropicLLM | LangChain ↗LangChain raises $125M to build the platform for agent engineering ↗
Reviewed
Inclusion in this database is not an endorsement of a company or its securities. Nothing here is a recommendation to buy or sell anything, and none of it is individualized investment advice. See the disclosures. Data: AI Map v3.22, released .