Compare software

alphaXiv vs R Discovery: catalog facts
alphaXiv	R Discovery
Free The homepage lists no prices; signing up adds following and discussion.	Freemium Free to use, with paid plans listed on its pricing page.
Web, Browser extension	Android, iOS, Web, Browser extension
Trending papers with summaries and discussion Follow specific authors and organizations	Personalized feed of new research papers Chat PDF and AI answers with references
Focused on arXiv papers Discussion features require an account	Some features require a paid plan Closed source hosted service
Web application, Browser extension	Downloadable app, Web application, Browser extension
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	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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