{
 "schema_version": 1,
 "generated": "2026-10-24",
 "repo": "VectifyAI/PageIndex",
 "name": "PageIndex",
 "owner": "VectifyAI",
 "slug": "vectifyai-pageindex",
 "github": "https://github.com/VectifyAI/PageIndex",
 "what": "PageIndex is a vectorless, reasoning-based RAG system that builds a tree index of long documents and lets an LLM search it like a human reader, with local and cloud SDK modes.",
 "why": "39k stars",
 "language": "Python",
 "requirements": [
  "Python",
  "An OpenAI API key (local mode) or a PageIndex API key (cloud mode)"
 ],
 "audience_note": "Developers building question answering over long documents such as financial reports, where chunked vector search loses context.",
 "risk": "none",
 "section": "earlier",
 "weekly_rank": null,
 "category": "Research",
 "url": "https://dedupedai.com/use-cases/vectifyai-pageindex/",
 "use_case_count": 3,
 "use_cases": [
  {
   "id": "vectifyai-pageindex--ask-questions-of-long-pdf-without-vectors",
   "title": "Ask questions of a long PDF without a vector database",
   "best": true,
   "url": "https://dedupedai.com/use-cases/vectifyai-pageindex/ask-questions-of-long-pdf-without-vectors/",
   "json": "https://dedupedai.com/use-cases/u/vectifyai-pageindex/ask-questions-of-long-pdf-without-vectors.json"
  },
  {
   "id": "vectifyai-pageindex--index-documents-in-pageindex-cloud",
   "title": "Store document indexes in the cloud",
   "best": false,
   "url": "https://dedupedai.com/use-cases/vectifyai-pageindex/index-documents-in-pageindex-cloud/",
   "json": "https://dedupedai.com/use-cases/u/vectifyai-pageindex/index-documents-in-pageindex-cloud.json"
  },
  {
   "id": "vectifyai-pageindex--compare-reasoning-rag-with-vector-rag",
   "title": "Compare reasoning-based retrieval with your vector RAG",
   "best": false,
   "url": "https://dedupedai.com/use-cases/vectifyai-pageindex/compare-reasoning-rag-with-vector-rag/",
   "json": "https://dedupedai.com/use-cases/u/vectifyai-pageindex/compare-reasoning-rag-with-vector-rag.json"
  }
 ],
 "disclaimer": "Third-party repos we don't own or vouch for. AI-generated use cases can be wrong: review everything and run at your own risk."
}