Compare software

OpenAlexSemantic Scholar
Free

Free to search, analyze and reuse.

 Free

Free to use in the browser.

Web Web, Browser extension
  • Covers about half a billion scholarly works
  • Web app, API and bulk download
  • Index of more than 238 million papers across all fields of science
  • Free to search without cost
  • A search catalog rather than an AI reading assistant
  • Analysis beyond the web app needs API or data skills
  • Semantic Reader is in beta and only available for select papers
  • Web only, with no offline use
Web application, Hosted service 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
Not stated if it works offline Needs internet

Checked October 1, 2026

Checked September 23, 2026

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