GNOME Authenticator is described as 'Gnome Authenticator is a desktop 2FA code generator for Linux desktops, like Ubuntu' and is a Authenticator in the security & privacy category. There are more than 25 alternatives to GNOME Authenticator for a variety of platforms, including Android, iPhone, Linux, Web-based and Mac apps. The best GNOME Authenticator alternative is Bitwarden, which is both free and Open Source. Other great apps like GNOME Authenticator are Ente Auth, Bitwarden Authenticator, Authy and Google Authenticator.