Authorizer has been discontinued. Similar apps include Bitwarden Authenticator, which is free and open source. Other options are 2FA Authenticator (2FAS), Authy, Nitrokey and YubiKey. Authenticators like Authorizer are a crowded field, with more than 25 alternatives for iPhone, Android, iPad, Linux and Mac.
Your digital identity will make life easier. Checking people's details confirming the person you’ve met online is who they say they are. Proving your identity to businesses. Proving your age online and out. Securely register and log into websites.
United Kingdom
United States
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+.
Italy
EU
Etopa is a two-factor-authentication app, which runs as a web server and can be accessed using a web browser or using an Android app. You can use the Etopa.de instance or host your own.
Infomaniak Auth is a free mobile application that improves and simplifies the security of Infomaniak accounts protected by two-factor authentication.
Switzerland
Two-factor authentication app for Yandex accounts and also other QR-code based temporary codes for two-factor authentication
Russia
Location-based behavioral biometrics SDK and APIs for frictionless mobile identification verification and authentication.
United States
Krypton implements the standardized FIDO Universal 2nd Factor (U2F) protocol to provide secure, un-phishable two-factor authentication on the web, using just your phone.
United States
TOTP Authenticator makes it simple and easy to enable 2-factor authentication on your accounts. The app provides option to backup data offline or on the cloud. Features like Push to Chrome, dark theme, custom icons and widgets make the app stand out.
India
Sentinel is an elegant OTP Authenticator app for both iOS and MacOS. It relies only on the Apple's iCloud Keychain to share data across devices.
This app is created for use with the YubiKey NFC and NEO to copy One-time-passwords (OTPs) from a YubiKey into the iOS clipboard.
United States
Fast, offline 2FA codes in your browser — TOTP two-factor authentication. Quick import from Google Authenticator.
