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OpenRead vs Paper Digest: catalog facts
OpenRead	Paper Digest
Freemium Free tier available, with a paid Pro plan.	Freemium Can be tried without signing in; full pricing is not described in the research.
Web	Web
Search across more than 300 million papers Compare several papers to spot agreements and contradictions	Literature review, question answering and claim verification in one place Search across papers, patents, grants and people
Web only, no desktop app Advanced features sit behind the Pro plan	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
Not stated if an account is needed	No 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.