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Stump vs Ubooquity: catalog facts
Stump	Ubooquity
Free Free and open source.	Free Free to download and use.
Web, Self-hosted	Windows, macOS, Linux, Self-hosted
Handles comics, manga and ebooks OPDS support for third-party reader apps	Runs anywhere Java runs, including NAS devices Reads Calibre and ComicRack metadata
Requires running your own server	Closed source Requires a Java runtime
Self-hosted	Downloadable app, Self-hosted
Open source	Closed source
License not stated	License not stated
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
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.