DeepPDF vs Paperpal

DeepPDF is a web PDF assistant, also offered as an extension, with free plans listed. Users can chat with PDFs, create summaries, compare translations, explain terms, and analyze images or formulas. OCR makes scanned, image-based PDFs searchable. Translation provides a side-by-side bilingual view in more than 100 languages. Conversion tools handle PDF to Word, Excel, PowerPoint, and other formats, plus Word to PDF. Utilities include compression, merging, splitting, page deletion, watermarks, signing, and online text editing. Google Scholar access supports academic-paper searches and recommendations. The browser upload area states a 200 MB maximum PDF size. The Free plan is free, billed forever, with 10 PDFs up to 5 MB each and limited AI and features. Pro is free during beta for 200 PDFs up to 50 MB, while Max is free during beta for 1,000 PDFs up to 200 MB; both list unlimited AI and features. Email support and a Discord community are available.

Paperpal is an AI research and academic writing workspace for students and researchers, combining writing help, citation tools, and academic checks. Users can upload references and PDFs, ask questions, and receive cited findings from more than 300 million verified research articles. Writing tools cover academic suggestions, paraphrasing, tone changes, word reduction, grammar, proofreading, and citation formatting. Its checker suite looks for plagiarism and AI-writing patterns, checks references, and assesses journal submission readiness. Paperpal runs on the web and as a browser extension; it also offers a Microsoft Word add-in and browser-extension support for Google Docs and Overleaf. The free plan includes 200 language suggestions, five generative AI uses per day, 7,000 plagiarism-check words per month, and five daily AI-detection scans of up to 1,200 words each. Prime costs $144 a year billed annually, or $25 a month billed monthly. Pro costs $348 a year billed annually, or $59 a month billed monthly. Paperpal says it does not train its AI models on user documents, uploads, or personal information, and allows document deletion.