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OpenComic vs Cosmic Comics: catalog facts
OpenComic	Cosmic Comics
Free Free to download, with an optional donation page.	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux	Linux
High-quality Lanczos3 downscaling for sharp pages Reading view customizable for comics and manga	Handles comics, manga and ebooks in one app Open source under GPL-3.0
ePub and PDF support is basic Focused on reading rather than library management	Official page gives very little feature documentation Linux build is the only one confirmed
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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