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Komga vs Ubooquity: catalog facts
Komga	Ubooquity
Free No pricing is listed; it is downloaded and run on your own server.	Free Free to download and use.
Web, Self-hosted	Windows, macOS, Linux, Self-hosted
Handles CBZ, CBR, PDF and EPUB Integrated web reader	Runs anywhere Java runs, including NAS devices Reads Calibre and ComicRack metadata
Requires running your own server License terms are not stated in the available research	Closed source Requires a Java runtime
Self-hosted	Downloadable app, Self-hosted
Closed source	Closed source
License not stated	License not stated
Not stated if an account is 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.