The following is a general comparison of OTP applications that are used to generate one-time passwords for two-factor authentication (2FA) systems using the time-based one-time password (TOTP), the HMAC-based one-time password (HOTP) algorithms or Mobile-OTP (mOTP), which is an older, open source, 2FA system for mobile phones that combines a userâÂÂs PIN, time and a per-device secret to generate OTPs. It also lists apps that support proprietary authentication methods, like those used by Steam or Yandex.
The following is an overview of authenticator applications that operate independently and are not integrated into password managers.
The following is an overview of password managers that include an integrated authenticator feature.