Is an authenticator app better than SMS codes?

Yes. Codes sent by text can be intercepted or stolen through a SIM-swap, where an attacker takes over your phone number. An authenticator app generates the code on your device, so there is nothing in transit to intercept.

What happens if I lose my phone?

This is why encrypted backups and token export matter. An app that backs up your tokens (encrypted) or lets you export them means a lost phone is an inconvenience, not a lockout. Set that up before you need it.

Are these tied to Google or Authy?

No. They use the open TOTP standard, the same one almost every site supports, so your codes are portable. You can move between any of these apps without re-enrolling every account from scratch, as long as you can export.

Best Free 2FA & Authenticator Apps in 2026

Private alternatives to Google Authenticator, Authy, vetted against our public criteria.

Two-factor authentication (2FA) adds a second layer of protection on top of your password. Even if someone steals your login, they still need the rotating code from your authenticator app to get in. These open-source authenticators keep those codes on your devices, with encrypted backups and easy import, so you are not locked into a single platform.

Aegis Authenticator

Aegis Authenticator: Encryption, Organization and Backups for Android

Android Phones Tablets

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ente Authenticator

Features: End-to-end encrypted cloud backups and multi device synchronization. Offline mode and import & export tokens. It's the only open-source solution that is available for…

Android Phones Tablets iOS iPhone iPad

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2FAS

Features: Device synchronization, modern user-interface and backups. The main advantages are the browser extensions that enable one-tap authentication and no need to switch…

Android Phones Tablets iOS iPhone iPad Firefox Chrome

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Tofu

Tofu: Easy-to-use and designed specifically for iOS

iOS iPhone iPad

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Raivo OTP

Unlisted for now because Raivo was sold, and the new owner wasn't able to clarify concerns listed in the GitHub discussion. The warning will be removed once the situation is…

Warning: Unlisted iOS iPhone iPad Mac

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What is two-factor authentication?

Two-factor authentication, or 2FA, is a method of authentication that protects your login credentials from hackers and unauthorised users. By requiring a second one-time code in addition to your regular password, authenticator apps provide an extra layer of protection for your accounts. If your password ever leaks, that second factor is what keeps an attacker out.

What to look for in an authenticator app

A good authenticator app should be open source so its security can be independently verified. Look for encrypted backups so you do not lose access to your accounts if you lose your phone, multi-device synchronisation, and the ability to import and export your tokens. Offline operation is a plus: the app should generate codes without ever needing to phone home.

Choosing the best 2FA app

The apps below cover Android, iOS, and desktop. Pick one that runs on every device you use, supports encrypted backups, and lets you export your tokens if you ever decide to switch. Avoid authenticators that lock your codes inside a proprietary cloud with no export path.

Frequently asked

Is an authenticator app better than SMS codes?: Yes. Codes sent by text can be intercepted or stolen through a SIM-swap, where an attacker takes over your phone number. An authenticator app generates the code on your device, so there is nothing in transit to intercept.
What happens if I lose my phone?: This is why encrypted backups and token export matter. An app that backs up your tokens (encrypted) or lets you export them means a lost phone is an inconvenience, not a lockout. Set that up before you need it.
Are these tied to Google or Authy?: No. They use the open TOTP standard, the same one almost every site supports, so your codes are portable. You can move between any of these apps without re-enrolling every account from scratch, as long as you can export.