LlamaIndex

The leading open-source data framework for building context-augmented AI agents and LLM applications.

LlamaIndex is the core data orchestration framework for connecting large language models (LLMs) to your private or domain-specific data. It operationalizes the Retrieval-Augmented Generation (RAG) pipeline: ingesting data from over 160 sources (APIs, PDFs, SQL databases), structuring it into specialized indices (vector, tree, list), and enabling efficient querying. This process grounds LLM responses in your specific knowledge base, accelerating time-to-production for applications like internal knowledge bases, document Q&A systems, and multi-agent workflows. The framework provides both high-level APIs for quick starts and low-level modular components for advanced customization.

https://www.llamaindex.ai