As companies build systems that combine retrieval and generation (RAG) for document search, knowledge-base QA, or AI agents, choosing the right framework is key. This article contrasts Haystack, LlamaIndex and LangChain across document ingestion, indexing and chunking strategies, vector-database support, metadata routing, LLM integration, scalability and use-cases — helping you decide... https://agixtech.com/rag-framework-comparison-haystack-llamaindex-langchain/