LangChain (framework)
Project record
Maintained by LangChain Inc.37
LangChain is an open-source Python framework for building agents and LLM applications. It gives a standard interface across model providers and many third-party integrations. Its agent API is built on LangGraph, and a JavaScript/TypeScript version, LangChain.js, lives in a separate repository.25
- Repository: Repository (external site: github.com)
- Documentation: Documentation (external site: docs.langchain.com)
- License: LICENSE (external site: github.com)
- Release notes: Releases (external site: github.com)
Availability and license
Overall availability
Documented as available to the general public. Access conditions and license terms may still apply.13
Availability is separate from permission: read the license before using or redistributing.
Public materials checklist
| Item | Status | Notes and evidence |
|---|---|---|
| Source codeIs the source code publicly readable? | Public | 1 |
| DocumentationIs user documentation published? | Public | Conceptual docs are at docs.langchain.com, and the API reference is at reference.langchain.com.52 |
| InstallationAre installation instructions or packages publicly available? | Public | Installed from PyPI with pip or uv. Model providers are added as separate integration packages.6 |
| Supported platformsAre supported operating systems or hardware documented? | Public | The install guide lists Python 3.10 or newer as a requirement. It does not list operating-system restrictions.6 |
| Release statusAre versioned releases published? | Public | Versioned releases are published on GitHub for each package, including langchain, langchain-core, and the provider integrations.4 |
What it is useful for
Organization context
U.S. eligibility
Eligible · basis: U.S.-governed project
The repository sits in the langchain-ai GitHub organization, and its LICENSE file assigns copyright to LangChain, Inc. LangChain's about page lists LangChain among the open-source frameworks the company develops and says the company is headquartered in San Francisco. Its terms of service identify LangChain Inc. as a Delaware corporation. No foundation or multi-organization governance body is documented.378
Sources
This listing is not an endorsement, a safety assessment, or a federal approval.