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Sioyek vs Atril: catalog facts
Sioyek	Atril
Free Free and open source under the GPL. The developer accepts optional donations.	Free Free and open source under the GPL.
Windows, macOS, Linux	Linux
Opens a referenced figure, table or citation in an overlay without losing your place Searchable highlights, bookmarks and marks across your whole library	Opens PDF, PostScript, DjVu, DVI, XPS and comic archives Lightweight with a traditional interface
The last tagged release is from December 2022 macOS shows a quarantine warning that needs working around on first launch	Viewing only, with no PDF editing Designed for the MATE desktop on Linux
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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