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Introducing PageIndex Flash
Introduction

What is PageIndex?

PageIndex is a vectorless, reasoning-based RAG engine that mirrors how humans read, delivering traceable, explainable, and context-aware retrieval, with no vector DBs or chunking. It works in two steps:

  • Index — generate a tree-structure index for each document.
  • Retrieve — agentically search that tree with LLM reasoning.
A document is turned into a tree index; an LLM then reasons over that index, guided by the query, to produce an answer.Tree IndexLLM ReasoningQueryAnswer

To learn more about PageIndex, please see our detailed introduction to the PageIndex framework .

Integrate PageIndex

Integrate PageIndex into your agents or applications

Try PageIndex App

Analyze and chat with your documents, directly in your browser

Enterprise

Dedicated cluster, or private deployment in your VPC for organizations

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Getting Started