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SciSpace vs Explainpaper: catalog facts
SciSpace	Explainpaper
Freemium Free sign-up, with paid plans for more usage and enterprise options.	Freemium Free to try; paid plan details were not in the research.
Web	Web
Search across more than 280 million papers Chat with PDF to explain difficult papers	Explains any highlighted passage in context Lets you ask questions about the paper
AI summaries of papers still need checking against the source Full features require a paid plan	Papers are uploaded to an online service AI explanations can be wrong and need checking
Web application	Web application
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.