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ChatPDF vs Explainpaper: catalog facts
ChatPDF	Explainpaper
Freemium Free to use, with a paid Plus upgrade.	Freemium Free to try; paid plan details were not in the research.
Web	Web
Answers cite the passages they come from Folders for chatting across several files	Explains any highlighted passage in context Lets you ask questions about the paper
Documents are processed on a remote service Chat history is only saved after signing up	Papers are uploaded to an online service AI explanations can be wrong and need checking
Downloadable app, Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.