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Arianna vs Foliate: catalog facts
Arianna	Foliate
Free Free and open source under the GPL-3.0, supported by KDE.	Free Free and open source, with no paid edition.
Linux	Linux
Finds books on the computer automatically Sorts the library by category, genre and author	Opens EPUB, Mobipocket, Kindle, FB2, CBZ and PDF Annotations and progress are plain JSON files you can sync however you want
Reads EPUB files only Linux only	Linux only; there is no Windows or macOS build Needs recent GTK4, libadwaita and WebKitGTK, which older distributions may not have
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 20, 2026

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