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Scholarcy vs SciSpace: catalog facts
Scholarcy	SciSpace
Freemium Free to start, with paid plans.	Freemium Free sign-up, with paid plans for more usage and enterprise options.
Web, Browser extension	Web
Summaries as interactive flashcards Imports from Zotero, Google Drive and YouTube	Search across more than 280 million papers Chat with PDF to explain difficult papers
Web service, needs an internet connection Full features require a paid plan	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.