LlamaIndex

Connect any data to any LLM, at scale

⭐ 4.2 / 5

freemium

💡

Expert's Tip

"The best framework for data ingestion and RAG pipelines. LlamaCloud makes deployment real — not just a research toy anymore."

What is LlamaIndex?

LlamaIndex specializes in connecting data sources — PDFs, databases, APIs, code repos — to LLMs in a structured, queryable way. It's the gold standard for building RAG (retrieval-augmented generation) pipelines where accuracy and document fidelity matter. The core framework is open-source and free. LlamaCloud adds managed parsing and indexing as a service — free tier of 10,000 credits/month, with credits priced at $1 per 1,000.

Ideal for teams building document intelligence apps, enterprise knowledge bases, contract analysis tools, and anything that needs to query large unstructured document collections reliably. LlamaParse handles complex PDFs, tables, and mixed content better than raw text extraction.

Where it competes with LangChain: both overlap significantly on RAG, but LlamaIndex is more specialized for data connectivity and document parsing while LangChain/LangGraph is stronger for complex agent orchestration. Most serious production apps end up combining both.