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Paperguide vs Undermind: catalog facts
Paperguide	Undermind
Freemium Free to start, with paid plans and demos for teams.	Freemium Free sign-up, with paid and enterprise plans.
Web	Web
Cited answers from a large paper index Imports libraries from Zotero and Mendeley	Reads full texts and figures, not only abstracts Follows citation trails to find related papers
Web only, with no offline use AI answers still need checking against the sources	Hosted service that requires an account Focused on scientific literature rather than general search
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked September 24, 2026

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