Compare software

Semantic Scholar vs SciSpace: catalog facts
Semantic Scholar	SciSpace
Free Free to use in the browser.	Freemium Free sign-up, with paid plans for more usage and enterprise options.
Web, Browser extension	Web
Index of more than 238 million papers across all fields of science Free to search without cost	Search across more than 280 million papers Chat with PDF to explain difficult papers
Semantic Reader is in beta and only available for select papers Web only, with no offline use	AI summaries of papers still need checking against the source Full features require a paid plan
Web application, Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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