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SciSpace vs Connected Papers: catalog facts
SciSpace	Connected Papers
Freemium Free sign-up, with paid plans for more usage and enterprise options.	Freemium Usable in the browser; check the site for current plan limits.
Web	Web
Search across more than 280 million papers Chat with PDF to explain difficult papers	Visual graph of related papers instead of a plain result list Helps discover related work from a single starting paper
AI summaries of papers still need checking against the source Full features require a paid plan	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 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.