LlamaIndex is a simple and flexible data framework for connecting custom data sources to large language models. It provides key tools for enhancing your LLM applications' data capabilities, including data ingestion, data indexing, and a querying interface. It empowers you to easily build powerful end-user applications such as document question answering, data-augmented chatbots, knowledge agents, and structured analysis. Supports connections to unstructured, structured, or semi-structured data sources.