Overview
LlamaIndex (formerly GPT-Index) is an open-source toolkit for loading, transforming, indexing, and querying private or enterprise data with LLMs. It abstracts away boilerplate so you can build context-aware agents, chatbots, and RAG pipelines that securely reason over structured or unstructured data at scale.
Key Capabilities
- 50+ document loaders (files, APIs, databases, cloud storage)
- Modular indexes: vector, list, tree, keyword, and graph-based
- Advanced retrievers with hybrid, multi-modal, and SQL semantics
- Query engines for Q&A, summarization, and document synthesis
- Agent toolkit for multi-tool, multi-step reasoning over private data
- LlamaCloud managed parsing & embedding service for production workloads
- Python and TypeScript SDKs plus integrations with LangChain, Milvus, Weaviate, Qdrant, and more
