PageIndex
Document index for reasoning-based, vectorless RAG that lets agents navigate long documents like a table of contents.
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Use cases
About PageIndex
PageIndex is listed in our memory & RAG category and is aimed at builders. Document index for reasoning-based, vectorless RAG that lets agents navigate long documents like a table of contents. Pricing, as the maker states it: Open source + cloud. Maturity: Mature. We last checked the official link on 2026-10-16.
What is PageIndex?
PageIndex is a document index for reasoning-based, vectorless RAG: no vector database and no chunking. It lets agents navigate long documents like a table of contents, reading more like a human.
The PageIndex SDK has a local mode for indexing, retrieval and chat on your machine with your own LLM key, or it can point at PageIndex Cloud. PageIndex Flash speeds up tree-index generation for text PDFs, and a File System layer extends reasoning across whole document collections.
Sources: the official README and our directory listing, checked 2026-10-18. Official site: pageindex.ai.
Who is PageIndex for?
Developers building agents over long documents, such as reports or filings, where chunked vector search loses structure.
PageIndex at a glance
- Open source: Yes (MIT License)
- GitHub: VectifyAI/PageIndex · 39,421 stars (as of Oct 21, 2026)
Key features
- Vectorless, reasoning-based retrieval
- Tree index like a table of contents
- Local SDK mode or cloud
- Corpus-level File System layer
PageIndex FAQ
What is PageIndex?
PageIndex is a document index for reasoning-based, vectorless RAG: no vector database and no chunking. It lets agents navigate long documents like a table of contents, reading more like a human.
Who is PageIndex for?
Developers building agents over long documents, such as reports or filings, where chunked vector search loses structure.
Is PageIndex free?
PageIndex's pricing, as the maker states it: Open source + cloud. Open-source tools are free to use, though you may still pay for model API usage or a hosted plan. Check the official site for current plans.
Is PageIndex open source?
Yes. PageIndex is released under the MIT License, according to its GitHub repository.
What are alternatives to PageIndex?
Similar tools include RAGFlow, Agentset, UltraRAG, Extend MCP, llmware and LlamaParse.
PageIndex ratings and reviews
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