ChatPDF vs PDF.chat
ChatPDF
chatpdf.com
PDF.chat
pdf.chatSide by side
| Figure | ChatPDF | PDF.chat |
|---|---|---|
| Price from | $7.50/mo | $4/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 5 | 10 |
| Spec score · AI PDF Tools | 9.3 (#3) | 8.6 (#6) |
| Spec score · AI PDF Assistants | 9.3 (#3) | 8.6 (#5) |
| API | The backend API supports uploading PDFs or adding them from public URLs, then querying them to build custom PDF chatbots. | The public API is a REST interface for document upload, OCR, polling jobs, page-cited chat, history retrieval and format downloads. |
| API limits | API documentation limits each PDF to 2,000 pages or 32 MB. | Files of five pages or fewer return inline, while larger jobs are asynchronous and require polling; paid plans raise per-file caps. |
| OCR | The iOS listing says the app extracts text from scanned documents and images through OCR. | Scanned and photographed PDFs are processed with OCR before chatting. |
| What it does | ChatPDF lets users upload documents and ask conversational questions, summaries, and extraction requests about their contents. | PDF.chat lets users upload PDFs and other documents, ask questions, and receive answers cited to exact source pages in more than 100 languages. |
Plans
ChatPDF
- FreeFree
- FreeFree
- ChatPDF Plus monthly$14.99 a month
- ChatPDF Plus yearly$89.99 a year
- ChatPDF PlusPriced on request
PDF.chat
- FreeFree
- Small pack$5, paid once
- Starter$5 a month
- Medium pack$15, paid once
- Pro$19 a month
- Large pack$40, paid once
- Starter$48 a year
- Business$49 a month
- Pro$182 a year
- Business$470 a year
In their own words
ChatPDF
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.
PDF.chat
PDF.chat lets users upload documents, ask questions, and receive answers cited to exact pages in over 100 languages. It accepts PDFs, Word and PowerPoint files, text files, and images, including scanned or photographed documents that its OCR models read on its own infrastructure. Long documents are indexed so questions can retrieve relevant pages from reports, textbooks, and dockets. Users can compare Claude, GPT, Gemini, Llama, and DeepSeek answers side by side in one chat, then export results as plain text, Markdown, DOCX, searchable PDF, CSV, or JSON. The service runs in a browser without a download or installation. Its REST API ingests documents, returns per-page text and metadata, and supports chat with page citations; API use is metered per page. The Free plan costs nothing, with pages resetting at midnight UTC and no credit card required. Starter costs $5 a month and includes 750 pages per month. PDF.chat says files are automatically deleted shortly after processing and are not sold, shared, or used for training; on paid tiers, relevant passages may be sent to third-party AI providers.