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Undermind vs Paper Digest: catalog facts
Undermind	Paper Digest
Freemium Free sign-up, with paid and enterprise plans.	Freemium Can be tried without signing in; full pricing is not described in the research.
Web	Web
Reads full texts and figures, not only abstracts Follows citation trails to find related papers	Literature review, question answering and claim verification in one place Search across papers, patents, grants and people
Hosted service that requires an account Focused on scientific literature rather than general search	Hosted service only Pricing for full use is not clearly stated
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 26, 2026

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