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Kavita vs COPS: catalog facts
Kavita	COPS
Freemium The server is free and open source. An optional Kavita+ subscription adds external…	Free Free and open source.
Windows, macOS, Linux, Self-hosted, Web	Web, Self-hosted
Purpose-built readers for EPUB, PDF and image-based comics, including webtoon mode Multi-user with per-library and age restrictions, through built-in logins or OIDC	Works directly with an existing Calibre library OPDS catalog for ebook reader apps
You have to run and maintain a server, and expose it safely if you want remote access Some metadata enrichment is only available through the paid Kavita+ add-on	Requires a web server you set up and maintain Depends on Calibre for managing the library
Self-hosted, Web application	Self-hosted
Open source	Open source
License: GPL-3.0	License: GPL-2.0
Account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 2, 2026

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