Apps similar to Sentinel Authenticator 2FA include Aegis Authenticator, which is free and open source. Other options are Proton Authenticator, Bitwarden Authenticator, 2FA Authenticator (2FAS) and Authy. You're spoiled for choice with Authenticators like Sentinel Authenticator 2FA: we list more than 50 alternatives for Android, iPhone, iPad, Mac and Windows.
Keysmith is a token generator for your two-factor authentication (2FA) logins. It supports time and hash-based one-time passwords (TOTP/HOTP).
Germany
EU
OTP authenticator app for managing your 2FA / OTP codes on iPhone, iPad, Mac and Apple Watch.
Australia
HungaryEU
LastPass Authenticator offers a unique one-tap password verification experience that no other authenticator app delivers.
United States
Encrypted Windows app for managing 2FA codes with AEGIS-256 and Argon2id, supporting Windows Hello, portable use, multilingual interface, token import/export, QR code/manual entry, generic TOTP, local storage, and dark mode interface for enhanced security.
GermanyEU
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+.
ItalyEU
Open-source Android authenticator supporting TOTP and HOTP, material design UI, backup and restore via files, Google Drive, or Android backup, works offline, privacy-focused, no analytics or ads, suitable for securing logins on popular services.
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
Clockode is a minimal, and offline-only TOTP code generator that stores your authentication secrets in an encrypted local vault, keeping your two-factor codes private and accessible without needing an internet connection.
