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Asta vs OpenRead: catalog facts
Asta	OpenRead
Free Offered by Ai2 as a research project; no paid plans are listed.	Freemium Free tier available, with a paid Pro plan.
Web	Web
Large corpus of 108M+ abstracts and 12M+ full-text papers Built by Ai2, the institute behind Semantic Scholar	Search across more than 300 million papers Compare several papers to spot agreements and contradictions
Web only Little detail about features is available on the homepage	Web only, no desktop app Advanced features sit behind the Pro plan
Web application	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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 September 26, 2026

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