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CLUSTER ANSWERS-DOCUMENTS-PDF · 16 ENTRIES · EARLIEST ENTRY 2026-09-05

PDF question answering apps

This cluster comprises web apps that answer questions from uploaded PDF documents by retrieving relevant passages and, in some cases, generating context-aware responses. The cluster's dated history is too thin to read a shape from — it predates the index or its members are undated. Traction leaders are encuesta-salud (16 stars) and studymate (9 stars).

Entry timeline

ENTRY TIMELINE

DEC 2025: 1AUG 2026: 5SEP 2026: 7OCT 2026: 3
DEC 2025OCT 2026

Each bar is the month a member carries, which is a creation date where the source published one and a crawl date otherwise. Nothing in the index was found before 11 August 2026, and coverage broadened sharply on 14–15 August, so a bar from then on reports how much we found that month, not how much was built; an earlier bar reports how far back a member's own source dated it — not how long we have been watching.

Members by activity

Activity signals, not revenue.

Build origin · 1 ai-built · 4 hand-coded · 11 unlabelled

Operator · 9 hobby · 7 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 16 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 01encuesta-salud16★1 mo—Web application that reads answers from PDF health questionnaires and stores them for analysis.
  2. 02studymate9★1 mo—hand-codedhobbyWeb app that answers questions from uploaded PDF documents by retrieving relevant content from the notes rather than generic knowledge.
  3. 03pdf-question-extractor-ai0★17 daysliveWeb app that extracts questions from PDF book chapters and offers document mapping, editing, and camera-based scanning.
  4. 04enterprise-rag-system0★4 days—hobbyWeb app that answers questions from uploaded PDF documents by retrieving relevant passages and generating context-aware responses.
  5. 05knowit-all-pdf0★21 daysliveai-builtAI app that answers questions from uploaded PDFs by retrieving relevant passages and citing sources.
  6. 06document_rag_ai0★26 days—Web app that answers questions about the contents of complex PDF documents, including tables and charts, using retrieval-augmented generation.
  7. 07knowledge_based-RAG0★13 dayslivehobbyWeb app that answers questions about uploaded PDF documents by retrieving relevant passages and generating grounded responses with citations.
  8. 08document-rag-assistant0★13 days—hobbyWeb app that answers questions over PDF documents using hybrid retrieval and returns cited source passages.
  9. 09LangChain-RAG-Chat-main0★1 molivehobbyWeb app that answers user questions by retrieving relevant information from uploaded documents.
  10. 10rag-document-qa-chatbot0★8 dayslivehobbyWeb app that answers questions from uploaded PDF documents by retrieving relevant passages.
  11. 11BrainBrew0★2 mo—hobbyWeb platform that turns uploaded PDFs into adaptive Socratic questioning sessions to build critical thinking instead of giving direct answers.
  12. 12DocMind-0★1 mo—Web app that answers questions from uploaded PDF documents using semantic search and returns cited source passages.
  13. 13AskMyPDF-GPT40★1 mo—Tool that lets users query PDF documents using GPT-4 for answers.
  14. 14raggenai0★1 mo—hand-codedhobbyWeb app that retrieves information from PDF documents and answers user questions using a language model and vector search.
  15. 15rag-langchain-ollama0★1 mo—hand-codedhobbyAssistant that answers questions by retrieving relevant passages from uploaded PDF documents using local language models.
  16. 16pdf-chatbot0★2 mo—hand-codedWeb application that answers questions from uploaded PDFs using retrieval and shows source excerpts.

Ranked by traction, highest first, and paged 20 at a time — this is a window on the cluster, never the whole of it. Ties are broken by a stable id so a product cannot appear on two pages or fall between them. Browse every cluster.