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Explainpaper vs PDF.ai: catalog facts
Explainpaper	PDF.ai
Freemium Free to try; paid plan details were not in the research.	Freemium Pricing is not detailed in the research.
Web	Web
Explains any highlighted passage in context Lets you ask questions about the paper	Chat and summaries for any PDF API for parsing, extraction and splitting
Papers are uploaded to an online service AI explanations can be wrong and need checking	Documents are processed on a hosted service Pricing is not clear from the research
Web application	Web application
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	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 26, 2026

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