Google Authenticator is described as 'Generates 2-Step Verification codes on your phone' and is a popular Authenticator in the security & privacy category. There are more than 50 alternatives to Google Authenticator for a variety of platforms, including Android, iPhone, iPad, Mac and Android Tablet apps. The best Google Authenticator alternative is Aegis Authenticator, which is both free and Open Source. Other great apps like Google Authenticator are KeePass, Ente Auth, Proton Authenticator and Bitwarden Authenticator.
LastPass Authenticator offers a unique one-tap password verification experience that no other authenticator app delivers.
Almost everyone thinks LastPass Authenticator is a great Google Authenticator alternative.
FreeOTP+ is a fork of FreeOTP with an updated user interface and with backup/restore functionality (to external files or via built-in Android backup/restore).
Easy to use, open-source, very stable.
Secure your Zoho Account with easy-to-use, multi-factor authentication. Because hackers won't give you a second chance.
2fast (acronym for two factor authenticator supporting TOTP) is the first free, open source, two factor authenticator for Windows and Android with the ability to store the sensitive data encrypted at a place of your choice instead of a 3rd party cloud location.
GTK+ application for securely managing TOTP & HOTP tokens. Content is encrypted on disk using AES256-GCM. Master password derived using PBKDF2 with 100k iterations & SHA512 as hash algorithm. Can import encrypted backups from andOTP & Authenticator+.
Keysmith is a token generator for your two-factor authentication (2FA) logins. It supports time and hash-based one-time passwords (TOTP/HOTP).
Secure your online accounts with Open Authenticator : a free, open-source and lovely-crafted TOTP (Time-Based One-Time Password) manager.
Authenticator Plus generates 2-step verification codes to protect your accounts with your password and phone / tablet.
Authenticator is a simple, free, and open source two-factor authentication app. It helps keep your online accounts secure by generating unique one-time passwords, which you use in combination with your other passwords to log into supporting websites.
Mauth (pronounced Moth) is a Two-Factor Authentication app with support for TOTP and HOTP (coming soon) and compatibility with Google Authenticator.
Two-factor authentication app for Yandex accounts and also other QR-code based temporary codes for two-factor authentication
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If you're already using Lastpass Passwordmanager, then you get trouble-free sync here (as opposed to Authy and FreeOTP).