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R Discovery vs TXYZ: catalog facts
R Discovery	TXYZ
Freemium Free to use, with paid plans listed on its pricing page.	Freemium Free plan available; Pro costs $96 per year and Ultra $288 per year.
Android, iOS, Web, Browser extension	Web
Personalized feed of new research papers Chat PDF and AI answers with references	Combines paper search, reading and writing in one workspace Usable free plan with file analysis up to 100 pages
Some features require a paid plan Closed source hosted service	Free plan keeps writing Pages history for only 30 days Larger files and higher limits require a paid plan
Downloadable app, Web application, Browser extension	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
Not stated if it works offline	Needs internet
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.