LlamaIndex vs Haystack

LlamaIndex specializes in RAG (Retrieval-Augmented Generation) with deep LLM integrations and flexible data indexing, while Haystack is a broader NLP pipeline framework that handles document processing, retrieval, and question-answering with more traditional search capabilities. LlamaIndex excels for LLM-centric applications, whereas Haystack provides more versatility for complex NLP workflows.