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Roundcube vs Nextcloud Mail: catalog facts
Roundcube	Nextcloud Mail
Free Free and open source webmail software.	Free Free and open source; installed as an app on a Nextcloud server.
Web, Self-hosted	Web, Self-hosted
Application-like webmail interface for any IMAP server Address book with LDAP connectors	Runs on your own Nextcloud server Works with existing IMAP accounts
Requires a PHP web server and an existing mail server Only a webmail front end, not a mail server itself	Needs a working Nextcloud installation Does not host mailboxes itself
Self-hosted	Self-hosted
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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