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OpenRead vs Paperguide: catalog facts
OpenRead	Paperguide
Freemium Free tier available, with a paid Pro plan.	Freemium Free to start, with paid plans and demos for teams.
Web	Web
Search across more than 300 million papers Compare several papers to spot agreements and contradictions	Cited answers from a large paper index Imports libraries from Zotero and Mendeley
Web only, no desktop app Advanced features sit behind the Pro plan	Web only, with no offline use AI answers still need checking against the sources
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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 26, 2026

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