Krypton Alternatives

    Krypton is described as 'implements the standardized FIDO Universal 2nd Factor (U2F) protocol to provide secure, un-phishable two-factor authentication on the web, using just your phone' and is an app in the Security & Privacy category. There are more than 10 alternatives to Krypton for a variety of platforms, including Android, Android Tablet, iPad, iPhone and Windows. The best alternative is Authy, which is free. Other great apps like Krypton are andOTP (Free, Open Source), Google Authenticator (Free), YubiKey (Paid) and SoloKeys (Paid, Open Source).

    This page was last updated May 28, 2021

    1. Authy is a simple way to manage two-factor authentication accounts. Authy supports Gmail, Dropbox, LastPass and thousands of other sites.
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    2. It implements Time-based One-time Passwords (TOTP) and HMAC-Based One-Time Passwords (HOTP). Simply scan the QR code and login with the generated 6-digit code.
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      • FreeProprietary
      • Android
      • iPhone
      • Blackberry
      • Android Tablet
      • iPad
      • Android Wear
      • Wordpress
      Google Authenticator generates 2-step verification codes on your phone.
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      • Windows
      • Linux
      • Android
      • Android Tablet
      The YubiKey is a one-time password device for secure login with two-factor authentication
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      • Mac
      • Windows
      • Linux
      • Android
      Solo is an open source security key, and you can get one at solokeys.com.


    3. 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.
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    4. VoiceProtect protects against password compromises, SIM swaps, and other two-factor authentication (“2FA”) vulnerabilities. It’s the first voice authentication solution for consumers and SMBs, where voice biometrics serves as a third factor.
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    5. OpenSK is an open-source implementation for security keys written in Rust that supports both FIDO U2F and FIDO2 standards.
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      • FreeProprietary
      • Android
      MFAuth is a free, secure and completely offline application that offers 2-step verification for managing your online accounts and services, thus helping to protect your accounts from hackers.
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    6. Zoho OneAuth, a free multi-factor authentication app, adds a firm layer of security to your account to protect it from password breaches.Enables single sign-on and works even when your device goes offline.
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    Showing 10 of 11 alternatives