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Komga vs COPS: catalog facts
Komga	COPS
Free No pricing is listed; it is downloaded and run on your own server.	Free Free and open source.
Web, Self-hosted	Web, Self-hosted
Handles CBZ, CBR, PDF and EPUB Integrated web reader	Works directly with an existing Calibre library OPDS catalog for ebook reader apps
Requires running your own server License terms are not stated in the available research	Requires a web server you set up and maintain Depends on Calibre for managing the library
Self-hosted	Self-hosted
Closed source	Open source
License not stated	License: GPL-2.0
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 October 2, 2026

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