10 Best Two Factor Authentication Apps of 2026

Ente Auth is the authenticator we would suggest to most people starting with two factor authentication, because it solves the lost-phone problem without charging for it. Codes are backed up to Ente's cloud with end-to-end encryption, and Ente says its cryptography has been externally audited. Every new device you sign into gets your codes, and there are apps for iPhone, Android, Mac, Windows and Linux plus a web app at auth.ente.io, so you can read a code from a work laptop. The app also runs offline and can be used without an account if you prefer local storage only. Day-to-day touches include a preview of the next code, service icons, notes, tags, pinning and search. You can add codes by QR code, by pasting a secret or by bulk import, and export them back out in the otpauth text format. The trade-offs are small: exports are unencrypted text, and the iOS listing is English only.

Proton Authenticator is the closest rival to Ente Auth and the better fit if you want to start with no account at all. You download the app, scan QR codes or import existing ones, and you are done; Proton says no signup, phone number or email address is needed. Codes are stored on your device first, and if you later want them on more devices you can sign in to a Proton Account to sync them with end-to-end encryption. The platform list is wide: iPhone, iPad, Apple Watch, Mac, Android, Linux and Windows, and the mobile and desktop apps work offline. Face or fingerprint sign-in, custom icons, search and a preview of the next code keep sign-ins quick. The app is open source, ad-free and free to use, and Proton advertises import from Google Authenticator and Authy, which makes switching easy. It lacks a web app, so a borrowed computer still needs your phone.

2FAS Auth is the pick for people who want an authenticator that never asks who they are. There is no account: 2FAS says use is 100% anonymous and that it does not store passwords or metadata. Tokens live on your device, and you decide whether to back them up to the cloud or export them manually. The app supports both TOTP and HOTP codes, and you can sort tokens into groups with badges, icons and labels. Its most useful extra is the 2FAS browser extension, which lets you send a code from your phone to the browser in one tap instead of typing six digits. There is an Apple Watch app as well, and 2FAS publishes its source code and a cryptography white paper. The limits: there is no full desktop app, codes on a computer go through the extension, and the current iOS release needs iOS 18.6 or later, which older iPhones may not run.

Bitwarden offers two ways to handle two factor codes. Bitwarden Premium, at $1.65 a month billed annually at $19.80, adds an integrated authenticator that creates six-digit timed codes and fills them right after your password, which removes most of the friction of 2FA on sites you visit daily. The Families plan includes the same feature for six users. Separately, Bitwarden publishes a free Bitwarden Authenticator app that generates codes for any site using time-based one-time passwords, for people who want a separate app from the same vendor. If you already use Bitwarden for passwords, this is the cheapest way to get autofilled codes. The trade-off is the one Bitwarden's own buyers should weigh: storing codes in the same vault as passwords means opening one account reveals both factors. The free password manager plan does not include the integrated authenticator.

Google Authenticator is the app many sites still name in their setup instructions, and it remains a sound choice if you already live in Google's services. You add an account by scanning a QR code, and the app produces time-based or counter-based codes even with no network or cellular connection. The feature that changed its standing is sync: sign in with your Google Account and your codes are backed up and available on all your devices, so a lost phone is no longer a disaster. Without sync, you can still move accounts to a new phone by scanning a transfer QR code. Google needs 2-Step Verification turned on to use it for your Google Account itself. The app is deliberately plain. There is no desktop or web app, few organizing tools, and using the cloud sync means trusting your Google Account with the codes, so people who want separation may prefer Ente Auth or Proton Authenticator.

Microsoft Authenticator is the app to install if your employer or school uses Microsoft 365, and it doubles as a general authenticator for everything else. For Microsoft accounts you approve a notification instead of typing a code, and you can go passwordless: enter your username, approve on your phone and confirm with fingerprint, Face ID or PIN. For other services it generates standard 30-second one-time codes that work offline, and Microsoft lists Facebook, Amazon, Dropbox, Google, LinkedIn and GitHub as examples. Work and school accounts can register the device and use certificate-based authentication to prove the sign-in comes from a trusted phone. The app is free and available in 42 languages on iOS. Outside the Microsoft world it is a capable but plain code generator, with no desktop or web app, and at 240.9 MB on iOS it is far heavier than Ente Auth or 2FAS.

Aegis Authenticator is the best option for Android users who want their codes on their own terms. Tokens live in an encrypted vault on the phone with optional biometric access, and there is no vendor cloud at all: automatic backups go to a folder you choose, and on cloud providers that support Android's Storage Access Framework, such as Nextcloud, that can be an off-device location. Manual vault exports are supported too. Aegis is generous on the way in, importing from Authenticator Plus, Authy, andOTP, FreeOTP, Google Authenticator, Microsoft Authenticator, Steam, TOTP Authenticator and WinAuth, though some imports need root. The interface supports Material You, a true dark mode, a tiles view and icon packs. Aegis is free, open source and available on Google Play and F-Droid, with 675K+ installs reported by the project. Its limit is reach: there is no iPhone or desktop version, so mixed households will want Ente Auth or Proton Authenticator.

1Password is the most polished way to handle one-time codes if you already pay for it as a password manager. In the browser extension you can scan a site's 2FA QR code directly from the page, and 1Password then fills the code automatically after your username and password, or copies it to the clipboard if you prefer. Watchtower goes a step further by telling you which of your saved accounts support two factor authentication, which is a practical to-do list for turning it on. Codes stored on items in a shared vault are shared too, which helps families. Pricing is the drawback for this use alone: Individual is $2.99 a month billed yearly on the first-year promotion and $3.99 at the regular price, with no free plan. 1Password itself says storing codes alongside passwords is not exactly the same as 2FA, so security-minded users may still keep a separate authenticator for email and banking.

Duo Mobile is the app you install because your workplace or university uses Cisco Duo, and it does that job well. Sign-ins send a Duo Push notification that you approve in one tap, or deny just as fast if you did not start the login, and the app also generates time-based passcodes for login prompts. It runs on iPhone, iPad and Apple Watch as well as Android, and you can add third-party accounts that use passcodes. For a small business, Duo is also a service you can buy: Duo Free covers teams of 10 or fewer users with MFA and the free app, and paid editions are Essentials at $3, Advantage at $6 and Premier at $9 per user a month, with a 30-day free trial. For personal use alone it makes less sense, because Duo accounts need activation through an organization's enrollment and the app listing documents fewer backup options than Ente Auth or Google Authenticator.

Twilio Authy was for years the default answer to the backup problem, and its core features still work: tokens are kept in encrypted cloud backups, multiple phones and tablets stay in sync, codes are generated offline, and 8-digit tokens are supported. It is free and runs on iPhone, iPad, Apple Watch and Android. The reason it now sits last is what has been taken away. Twilio retired the Authy desktop apps for Windows, Mac and Linux in March 2024, so codes are phone-only, and the iOS app lists just three languages. The App Store listing describes no way to export your tokens, while Ente Auth, Aegis and Proton Authenticator document export and import. If your codes are already in Authy and backed up, there is no urgency to move, but new users get more from Ente Auth's sync with desktop and web apps or Proton Authenticator's desktop apps.