Haystack vs LlamaIndex

LlamaIndex is the best choice if your primary need is high-quality parsing of complex, layout-rich documents into structured data for LLMs. If you're building a full RAG or agent pipeline with multiple data sources and providers, Haystack's open-source framework offers more flexibility and control. For document-first workflows, go with LlamaIndex; for end-to-end AI application orchestration, choose Haystack.