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Paperguide vs SciSpace: catalog facts
Paperguide	SciSpace
Freemium Free to start, with paid plans and demos for teams.	Freemium Free sign-up, with paid plans for more usage and enterprise options.
Web	Web
Cited answers from a large paper index Imports libraries from Zotero and Mendeley	Search across more than 280 million papers Chat with PDF to explain difficult papers
Web only, with no offline use AI answers still need checking against the sources	AI summaries of papers still need checking against the source Full features require a paid plan
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 23, 2026

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