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SciSpacealphaXiv
Freemium

Free sign-up, with paid plans for more usage and enterprise options.

 Free

The homepage lists no prices; signing up adds following and discussion.

Web Web, Browser extension
  • Search across more than 280 million papers
  • Chat with PDF to explain difficult papers
  • Trending papers with summaries and discussion
  • Follow specific authors and organizations
  • AI summaries of papers still need checking against the source
  • Full features 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
Account needed Not stated if an account is needed
Needs internet Needs internet

Checked September 23, 2026

Checked October 1, 2026

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