Yubico Authenticator is described as 'Store your unique credentials on a hardware-backed security key and take it wherever you go from mobile to desktop. No more storing sensitive secrets on your mobile phone, leaving your account vulnerable to takeovers' and is a Authenticator in the security & privacy category. There are more than 10 alternatives to Yubico Authenticator for a variety of platforms, including iPhone, iPad, Mac, Windows and Linux apps. The best Yubico Authenticator alternative is Aegis Authenticator, which is both free and Open Source. Other great apps like Yubico Authenticator are Proton Authenticator, Ente Auth, Stratum and Raivo Authenticator.