Roundcube is licensed under the GNU GPL version 3 or later, with exceptions for skins and plugins.

[6] Roundcube Next was intended to include additional features like calendar, chat and file management.

In 2023, a pro-Russia hacking group Winter Vivern[9] exploited a cross-site scripting vulnerability to attack European government entities and a think tank, as reported by researchers from ESET.

[11] In November 2023, the open-source file hosting software suite Nextcloud announced its partnership with Roundcube.

Roundcube Webmail is designed to run on standard web servers such as Apache, LiteSpeed, Nginx, Lighttpd, Hiawatha or Cherokee in conjunction with a relational database engine.