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Asta vs Paper Digest: catalog facts
Asta	Paper Digest
Free Offered by Ai2 as a research project; no paid plans are listed.	Freemium Can be tried without signing in; full pricing is not described in the research.
Web	Web
Large corpus of 108M+ abstracts and 12M+ full-text papers Built by Ai2, the institute behind Semantic Scholar	Literature review, question answering and claim verification in one place Search across papers, patents, grants and people
Web only Little detail about features is available on the homepage	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.