LlamaIndex simplifies the connection between custom data sources and large language models, offering robust capabilities in document ingestion, parsing, retrieval, indexing, querying, and evaluation. Designed for developers, it allows quick prototyping and building of LLM applications using Python and Typescript. Users can access over 160 data sources, engage with community-contributed tools, and utilize its advanced features to orchestrate workflows over data. LlamaIndex represents a powerful solution for creating production-ready applications that leverage generative AI.