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alphaXiv vs TXYZ: catalog facts
alphaXiv	TXYZ
Free The homepage lists no prices; signing up adds following and discussion.	Freemium Free plan available; Pro costs $96 per year and Ultra $288 per year.
Web, Browser extension	Web
Trending papers with summaries and discussion Follow specific authors and organizations	Combines paper search, reading and writing in one workspace Usable free plan with file analysis up to 100 pages
Focused on arXiv papers Discussion features require an account	Free plan keeps writing Pages history for only 30 days Larger files and higher limits require a paid plan
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
Needs internet	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.