Compare software

Semantic ScholarOpenAlex
Free

Free to use in the browser.

 Free

Free to search, analyze and reuse.

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

Checked September 23, 2026

Checked October 1, 2026

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