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SciSummary vs ChatPDF: catalog facts
SciSummary	ChatPDF
Freemium Free to try, with paid plans for more use.	Freemium Free to use, with a paid Plus upgrade.
Web	Web
Built specifically for the structure of academic papers Extracts figures and references, not just text	Answers cite the passages they come from Folders for chatting across several files
Summaries are AI-generated and should be checked against the paper Web only, with no offline use	Documents are processed on a remote service Chat history is only saved after signing up
Web application	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 23, 2026

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