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SciSpace vs Semantic Scholar: catalog facts
SciSpace	Semantic Scholar
Freemium Free sign-up, with paid plans for more usage and enterprise options.	Free Free to use in the browser.
Web	Web, Browser extension
Search across more than 280 million papers Chat with PDF to explain difficult papers	Index of more than 238 million papers across all fields of science Free to search without cost
AI summaries of papers still need checking against the source Full features require a paid plan	Semantic Reader is in beta and only available for select papers Web only, with no offline use
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
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.