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, Android Tablet and Mac apps. The best Google Authenticator alternative is Bitwarden, which is both free and Open Source. Other great apps like Google Authenticator are Aegis Authenticator, Ente Auth, KeePass and Proton Authenticator.
Stratum (formerly Authenticator Pro) is a community-backed open-source project which aims to provide privacy and security to users. The source-code is auditable by anyone on GitHub and released under the GPL 3.0 license.
OneKeePass supports the well known KeePass-compatible database (Kdbx 4.x). It stores and manages all your passwords and other sensitive information in a single encrypted file that can be stored in any location, including local and public cloud solutions. You keep?
Authenticator generates two-factor authentication (2FA) codes in your browser. Use it to add an extra layer of security to your online accounts.
Sign in is easy, convenient, and secure when you use Microsoft Authenticator. Use your phone, not your password, to log into your Microsoft account. You simply have to enter your username, then approve the notification sent to your phone.
Manage all your passwords across all devices. Open Source password manager compatible with kdbx/keepass. Available on Android, iOS, iPadOS, MacOS, Linux and Windows. It can also be used as a cross-platform supported two factor authentication app.
Alternative client for the Bitwarden® platform & KeePass (KDBX), created to provide the best user experience possible.
OnlyKey is an open source alternative to YubiKey. OnlyKey natively supports: a hardware password manager, multiple two-factor methods (FIDO2, TOTP, and Yubico® OTP), passwordless SSH login, and OpenPGP.
Open-source authenticator app for iOS and macOS generates time-based one-time passwords, supports secure iCloud sync and encrypted backup, FaceID and TouchID unlocking, QR code scanning, custom icons, search, handoff for copying codes, and encrypted export.
LastPass Authenticator offers a unique one-tap password verification experience that no other authenticator app delivers.
Tofu generates one-time passwords to help you protect your online accounts. These passwords are used together with your normal password when you sign into services like Google, Facebook, Dropbox, Amazon, and GitHub.
Gnome Authenticator is a desktop 2FA code generator for Linux desktops, like Ubuntu.
Protectimus Solutions provides a powerful multi-factor authentication service. We offer 2FA SaaS platform and on-premise version of the product which supports a great variety of TOTP tokens and program tokens for OTP delivery.
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It works on wear os and it is open-source.