DeinPDF vs Explainpaper

DeinPDF is a browser-based assistant for asking questions about contracts, invoices, letters, and technical documents. Users can upload PDFs and images, including scanned pages, then ask questions across one or several documents in a temporary chat with page references. The service can summarize long documents and translate them into more than 16 languages. Suggested actions can help surface legal risks, deadlines, payment terms, action items, and obligations, or explain documents in simpler language. In instant mode, the file, index, and chat are erased after the conversation, with confirmation. The maker says documents are stored in Germany and AI processing takes place in the EU, with no transfer to third countries; it also says user documents and inputs are not used to train models. Security features listed include two-factor authentication, SSL/TLS encryption, and tenant isolation. DeinPDF works in a browser and can be added to an iPhone or Android home screen without an app store. There is no monthly base fee or forced subscription. Usage-based charges apply, with €0.50 starting credit and top-ups from €10. The terms warn that AI output may be incorrect or misleading and does not replace professional advice.

Explainpaper is a web-based AI reader for research papers. Readers highlight confusing passages to get explanations with adjustable complexity, support for more than 50 languages, and context from the full paper. Paper chat answers questions using the paper’s content, allows follow-ups, and can summarize findings; answers can cite sections so readers can locate relevant material. The product also generates outlines, extracts key points, and shows relationships between concepts. Its free plan is available indefinitely and includes unlimited highlight explanations, follow-up questions, Zotero library import, and basic AI models. Pro costs $16 a month and adds Math Explain for formulas and figures, advanced AI models, whole-paper summaries, saved highlights and explanations, and paper questions. The Pro trial lasts seven days and requires a card. Explainpaper says subscriptions are billed monthly or annually according to the selected plan and payments are processed through Stripe. The product describes its audience as researchers.