Apps similar to itsme include 2FA Authenticator (2FAS), which is free and open source. Other options are Authy, Google Authenticator, FreeOTP and Authenticator Extension. You're spoiled for choice with Authenticators like itsme: we list more than 25 alternatives for iPhone, Android, iPad, Mac and Windows.
Calculates time- and counter-based one-time passwords on iOS devices, supports QR code import, iPad interface, Notification Center widget, encrypted iCloud sync, Safari extension, Touch ID and password protection, no ads, and does not collect personal data.
Germany
EU
Hermes offers a straightforward solution for overseeing two-factor authentication accounts (SHA1), providing support for a wide range of platforms, including Gmail, Dropbox, and thousands of other websites.
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.
Authenticator Plus generates 2-step verification codes to protect your accounts with your password and phone / tablet.
Invantive Authenticator is a two-step verification solution for use with TOTP-protected websites and products such as Exact Online. Made in Holland by a partner of Exact, awarded accountancy app partner of the year 2017.
NetherlandsEU
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.
HENNGE OTP Generator is a virtual device application for multi-factor authentication (MFA), so-called two-step verification, which generates time-based one-time passwords (OTP).
Japan
Fast, offline 2FA codes in your browser — TOTP two-factor authentication. Quick import from Google Authenticator.
SecKey provides one time passwords to be used with the two factor authentication of Dropbox, Google, Facebook, GitHub, Proton Mail and many more.
SwedenEU
Token2 mobile application can be used with Token2 service, or any other TOTP and Mobile-OTP compliant service with additional features such as possibility of PIN code protection for TOTP profiles and QR code based enrollment for Mobile-OTP profiles.
Switzerland
Coffer is a self-hosted, multi-user authenticator vault. It generates TOTP codes in the browser and encrypts each user's vault before storing it on the server. It also supports QR imports, groups, backups, and 2fas transfers.
Türkiye
