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