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Undermind vs Connected Papers: catalog facts
Undermind	Connected Papers
Freemium Free sign-up, with paid and enterprise plans.	Freemium Usable in the browser; check the site for current plan limits.
Web	Web
Reads full texts and figures, not only abstracts Follows citation trails to find related papers	Visual graph of related papers instead of a plain result list Helps discover related work from a single starting paper
Hosted service that requires an account Focused on scientific literature rather than general search	Web only, needs an internet connection Plan limits are not described on the homepage
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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