Haystack

Haystack (deepset) is a mature open framework for NLP/RAG pipelines: document stores, retrievers, rankers, and production connectors. Strong alternative/complement to LlamaIndex. Powers “understand” over corpora while agents remain thin orchestrators over Haystack pipelines. Haystack is deepset's Python framework for component pipelines, RAG, and tool-using agents, with explicit routing, loops, state transfer, serialization, and deployment integrations. Open-source AI orchestration framework for building context-engineered, production-ready LLM applications. Design modular pipelines and agent workflows with explicit control over retrieval, routing, memory, and generation. Built for scalable agents, RAG, multimodal applications, semantic search, and conversational systems. | | | | Docs | | | Meta |.