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AI PDF Reader vs ChatPDF

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. AI PDF Reader publishes a starting price ($3.99); ChatPDF does not. Both have a free tier. Only ChatPDF ships a public API.

AI PDF ReaderChats with uploaded PDFs to summarize, answer questions, translate, and turn sections into mind maps.ChatPDFAsk questions about PDFs, documents and videos

Side by side

FactAI PDF ReaderChatPDF
CategoryChat with Documents & PDFPDF Tools
Pricing modelFreemiumFreemium
Starts at$3.99 month—
Public APINoYes
PlatformsWebWeb, macOS, API
Company—ChatPDF GmbH
Launched—2023
Last verifiedSep 1, 2026Sep 6, 2026

What our research says

AI PDF Reader

Reasonable for someone who regularly needs to pull answers or summaries out of long PDFs without reading them cover to cover, and the entry price is low compared to many document-chat tools. There is no visible company behind the brand, so treat it as a utility rather than something to build a workflow around long-term.

Pros

  • Entry-level paid tier is inexpensive at $3.99/month
  • Supports large files (up to 50MB, ~5M characters) and multi-file chat
  • Adds extras beyond Q&A: translation, rewriting, and mind maps

Cons

  • No parent company or ownership information is disclosed
  • Free tier's exact limits are mentioned but not fully detailed on the page

ChatPDF

The quickest way to interrogate one long PDF without building retrieval yourself, and the page-level citations are what keep it honest. But ChatGPT and Claude now read PDFs natively, so ChatPDF only earns its subscription if you need those citations, the multi-file view, or the API.

Pros

  • answers cite specific pages, so you can check them instead of trusting them
  • handles Word, PowerPoint, Markdown and text files, not only PDF
  • REST API supports streaming and multi-turn conversations
  • free tier works with no account and no card

Cons

  • two documents a day on free runs out fast during real research
  • Plus pricing is not published anywhere on the site
  • no team plan, SSO or shared document library
  • hard per-file limit of 2,000 pages or 32 MB

Which one fits

Choose AI PDF Reader if you need

  • Students and researchers summarizing or translating long documents
  • Anyone who wants to ask a PDF direct questions instead of searching it manually

Choose ChatPDF if you need

  • students and researchers pulling verifiable quotes out of long papers
  • checking claims inside a contract or report you did not write
  • developers wanting a hosted PDF-Q&A endpoint instead of rolling their own RAG stack

More comparisons

Browse all Chat with Documents & PDF →