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UPDF vs ChatPDF: catalog facts
UPDF	ChatPDF
Freemium Free to try, with paid plans for the full feature set.	Freemium Free to use, with a paid Plus upgrade.
Windows, macOS, Android, iOS, Web	Web
Apps for desktop and mobile platforms Editing, OCR, conversion and redaction in one app	Answers cite the passages they come from Folders for chatting across several files
Proprietary, with full features behind a paid plan The AI features rely on an online service	Documents are processed on a remote service Chat history is only saved after signing up
Downloadable app, Web application	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	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.