Library / SDK
Retrieval & MemoryAgents & Orchestration
Haystack
1Production-ready 2pipelines 3for 4search 5and 6RAG.
the six Ws · specification
W1
Who
Open-source framework from deepset.
W2
What
Builds search, RAG, and question-answering pipelines.
W3
Where
A Python library, self-hosted or on deepset Cloud.
W4
When
When production retrieval and RAG quality matter.
W5
Why
Composable, production-focused pipelines over your data.
W6
With
Document stores, embedding models, and an LLM.
alternatives