ChatPDF vs Doxy

ChatPDF lets users summarize documents and ask questions about their contents using conversational AI. Answers include citations that point to references in a PDF, and users can organize files in folders or discuss multiple PDFs in one conversation. It accepts PDFs in any language and supports conversations in any language; listed file types also include Word, PowerPoint, Markdown and text. Sharing links can be created, with access permissions managed or revoked. ChatPDF says documents are encrypted during transfer and storage and can be deleted by the user. Queries are routed dynamically between GPT-4o and GPT-4o-mini. The service works in a browser on any device and is listed for Android, iOS, Linux, macOS and Windows. Its backend API accepts uploaded PDFs or public URLs and lets users query them to build custom PDF chatbots. The API documentation limits each PDF to 2,000 pages or 32 MB and describes the chat API as stateless. The Free plan costs nothing and allows two documents per day.

Doxy is a web document-chat app for asking questions about uploaded files and other source material. Users organise files into projects, ask questions in plain language and receive answers that cite the documents used. Supported inputs include PDFs, Word, PowerPoint, Excel, images, audio, HTML, CSV, ZIP and EPUB files, plus web links and YouTube URLs. YouTube questions use the video transcript. Users can upload and ask questions in many languages, with answers in the question’s language where the source supports it. Pro and Business plans generate multiple-choice quizzes with explanations and open-ended practice exercises from selected sources. The Free plan costs nothing for 3 documents, 20 questions monthly and 10 MB files. Pro costs $4.99 a month for 100 documents, 1,000 questions monthly and 50 MB files. Business costs $9.99 a month with unlimited documents and questions and 200 MB files. An account is required.