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MuPDF vs Papers: catalog facts
MuPDF	Papers
Free Free and open source under the AGPL. Commercial licensing is sold separately.	Free Free GNOME app, supported by donations to the GNOME Foundation.
Windows, macOS, Linux, Android, iOS, Command line	Linux
Extremely fast and small, with accurate rendering The bundled mutool covers most scripted PDF manipulation	Annotation and highlighting of PDFs Opens DjVu, TIFF and comic book archives
The viewer interface is deliberately minimal and keyboard-driven Commercial use of the library needs a paid licence from Artifex	Linux only No full PDF text editing
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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