Library / SDK
Agents & OrchestrationRetrieval & Memory
★ featured
LangChain
1The 2original 3toolkit 4for 5LLM 6apps.
the six Ws · specification
W1
Who
The widely-used open-source framework from LangChain.
W2
What
Chains models, tools, and memory into LLM applications.
W3
Where
Python and JavaScript libraries on your own infrastructure.
W4
When
When assembling retrieval, tools, and prompts into apps.
W5
Why
A broad, batteries-included toolkit with a huge ecosystem.
W6
With
Any LLM provider plus vector stores and tools.
alternatives