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Semantic ScholaralphaXiv
Free

Free to use in the browser.

 Free

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

Web, Browser extension Web, Browser extension
  • Index of more than 238 million papers across all fields of science
  • Free to search without cost
  • Trending papers with summaries and discussion
  • Follow specific authors and organizations
  • Semantic Reader is in beta and only available for select papers
  • Web only, with no offline use
  • Focused on arXiv papers
  • Discussion features require an account
Web application, Browser extension 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

Checked September 23, 2026

Checked October 1, 2026

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