LangChain / LangGraph
LangChain, Inc. · Frameworks & platforms
Global ActiveOpen sourceFree tier
01
Overview
LangChain is LangChain Inc.'s open-source agent framework with a pre-built agent architecture and integrations for any model or tool; LangGraph is the same company's low-level orchestration runtime, and LangChain itself runs on LangGraph's durable runtime — framework and runtime layers of one stack.
02 / Provenance
Field checks and source notes
When sources disagree on a field, every reading is listed here with its own citation. We do not take a midpoint, invent a missing figure, or decide which side is right — follow the citation and judge for your case.
These field-level notes are recorded verbatim in Chinese in the source data. Open the Chinese version
03
Agent fields
| Field | Value |
|---|---|
| Group | Frameworks & platforms |
| Runtime form | api / cli / self_hosted |
| Open source | Open source |
| Self-hostable | Open source |
| License | MIT |
| Free tier | The LangChain and LangGraph libraries are free (MIT); the companion commercial platform LangSmith is billed separately, and its pricing page was not checked for this entry. |
| Paid plans from | Not disclosed |
| Price checked | — |
| Underlying model support | Not disclosed |
| Target users | Not disclosed |
| Headquarters | United States |
05
Change log
- LangChain 1.0 was released as the first major version of the framework