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Paper Digest vs Scholar Inbox: catalog facts
Paper Digest	Scholar Inbox
Freemium Can be tried without signing in; full pricing is not described in the research.	Free Free to use.
Web	Web
Literature review, question answering and claim verification in one place Search across papers, patents, grants and people	Personalized recommendations rather than a raw feed Daily coverage of arXiv, bioRxiv, medRxiv and ChemRxiv
Hosted service only Pricing for full use is not clearly stated	Limited to the preprint servers and proceedings it indexes Recommendations need time to learn your interests
Web application	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 26, 2026	Official website Full listing and sources Checked October 1, 2026

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