ChatPDF vs Kenkyu.ai
ChatPDF
chatpdf.comKenkyu.ai
kenkyu.aiSide by side
| Figure | ChatPDF | Kenkyu.ai |
|---|---|---|
| Price from | $7.50/mo | ¥1,260/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | — |
| Plans published | 5 | 3 |
| Spec score · Text Summarization Software | 9.4 (#2) | 8.0 (#13) |
| Cited answers | Responses can include citations linked to source pages in the uploaded document. | Users can attach one or more sources to AI prompts and open the cited source paragraph with one click. |
| Intended users | The site presents ChatPDF for researchers, students, and professionals working with documents such as papers, contracts, and reports. | The site names university and postgraduate students, professors, science labs, clinics and doctors, writers, and journalists as intended users. |
| Purpose | ChatPDF lets users summarize PDFs and ask questions about them using conversational AI. | Kenkyu.ai translates, summarizes, and extracts information from research papers for academic research. |
| Security | The site says documents are encrypted during transfer and storage, and can be deleted by the user. | The FAQ says the service uses robust infrastructure and authentication as part of its security practices. |
| Translation | ChatPDF offers PDF translation and says documents and chats can use different languages. | The service translates research papers from major languages into the user's native language. |
Plans
ChatPDF
- FreeFree
- FreeFree
- ChatPDF Plus monthly$14.99 a month
- ChatPDF Plus yearly$89.99 a year
- ChatPDF PlusPriced on request
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.