RAG and workflowOpen sourceUpdated 2026
Haystack
Intermediate · Python framework
Open-source framework for production-style search, RAG, and NLP pipelines.
Best for
Teams building retrieval pipelines with a more engineering-oriented architecture.
Why use it
Useful when you want composable pipelines and production retrieval patterns.
Tradeoffs
May feel heavier than lightweight RAG scripts for small prototypes.
Key features
- RAG pipelines
- Search components
- Production-oriented architecture
Alternatives
LlamaIndex, LangChain, Dify
Where it fits
Haystack belongs in the rag and workflow layer of an open AI stack. Evaluate it against your model runtime, privacy needs, deployment target, and the amount of operational complexity your team can support.
CategoryRAG and workflowLicenseApache 2.0DeploymentPython frameworkModeCode framework
Haystack GitHub →Recommendation
Use Haystack when retrieval pipelines need more structure.