# Two-factor authentication privacy ratings

Authenticator apps for one-time codes.

| Name | Grade | Jurisdiction | Description |
| --- | --- | --- | --- |
| [Aegis](https://privacyratings.com/two-factor-authentication/aegis/) | B (80/100) | Unknown | Free and open source authenticator app for Android that stores codes in an encrypted local vault. It supports encrypted backups, imports from many other authenticator apps and has no internet permission. |
| [Authenticator](https://privacyratings.com/two-factor-authentication/authenticator/) | B (80/100) | Unknown | Open source two-factor authentication app for iOS that stores secrets encrypted in the iOS keychain. The app never connects to the internet. |
| [Authenticator CC](https://privacyratings.com/two-factor-authentication/authenticator-cc/) | B (80/100) | Unknown | Open source browser extension for Chrome, Firefox and Edge that generates TOTP and HOTP codes. Accounts can be encrypted with a password and backed up to a file or the user's cloud storage. |
| [Authenticator GNOME](https://privacyratings.com/two-factor-authentication/authenticator-gnome/) | B (80/100) | Unknown | Open source two-factor code generator for the GNOME desktop, written in Rust. It supports TOTP, HOTP and Steam codes, a GNOME Shell search provider and backups to and from other authenticator apps. |
| [Chronos Authenticator](https://privacyratings.com/two-factor-authentication/chronos-authenticator/) | B (80/100) | Unknown | Open source two-factor authentication app for iOS that supports TOTP and HOTP codes. Tokens are encrypted on the device, with optional encrypted iCloud sync and exports. |
| [FreeOTP](https://privacyratings.com/two-factor-authentication/freeotp/) | B (80/100) | Unknown | Open source two-factor authentication app sponsored by Red Hat that generates HOTP and TOTP codes. Tokens are added by scanning a QR code. |
| [FreeOTP+](https://privacyratings.com/two-factor-authentication/freeotp-plus/) | B (80/100) | Unknown | Open source fork of FreeOTP for Android that adds backup export and import, search, categories, biometric lock and offline token icons. Generates HOTP and TOTP codes. |
| [Stratum](https://privacyratings.com/two-factor-authentication/stratum/) | B (80/100) | Unknown | Free and open source two-factor authentication app for Android with encrypted backups, icon packs, categories and a Wear OS companion app. It imports from many other authenticator apps. |
| [Bitwarden Authenticator](https://privacyratings.com/two-factor-authentication/bitwarden-authenticator/) | C (70/100) | United States (Five Eyes) | Free, open source authenticator app for iOS and Android from Bitwarden that generates TOTP codes. It works without an account and can optionally sync codes with a Bitwarden password manager vault. |
| [Ente Auth](https://privacyratings.com/two-factor-authentication/ente-auth/) | C (70/100) | United States (Five Eyes) | Free, open source TOTP authenticator for mobile, desktop and web. Works fully offline, or with an Ente account to sync codes across devices with end-to-end encrypted backups. |
| [Proton Authenticator](https://privacyratings.com/two-factor-authentication/proton-authenticator/) | C (65/100) | Switzerland | Free, open source authenticator app from Proton for Android, iOS, macOS, Windows and Linux. It works without an account, and signing in with a Proton account adds end-to-end encrypted sync. |
| [2FAS](https://privacyratings.com/two-factor-authentication/2fas/) | D (50/100) | United States (Five Eyes) | Open source authenticator app for Android and iOS with a browser extension for filling codes. Backups can be encrypted and synced through the user's Google Drive or iCloud without a 2FAS account. |
| [OTP Auth](https://privacyratings.com/two-factor-authentication/otp-auth/) | D (50/100) | Germany (Fourteen Eyes) | Two-factor authentication app for iPhone, iPad, Apple Watch and Mac that generates one-time codes, with optional iCloud sync and encrypted backups. |
| [Tofu](https://privacyratings.com/two-factor-authentication/tofu/) | D (50/100) | Unknown | Open source two-factor authentication app for iOS that generates TOTP and HOTP codes. It works without a network connection. |
| [Yubico Authenticator](https://privacyratings.com/two-factor-authentication/yubico-authenticator/) | D (50/100) | Sweden (Fourteen Eyes) | Authenticator app from Yubico that stores OATH one-time password secrets on a YubiKey instead of the phone or computer, and generates codes when the key is connected or tapped. |
| [Google Authenticator](https://privacyratings.com/two-factor-authentication/google-authenticator/) | F (20/100) | United States (Five Eyes) | Two-factor authentication app from Google that generates time-based and counter-based one-time codes. Codes can optionally be backed up and synced to a Google Account. |
| [Microsoft Authenticator](https://privacyratings.com/two-factor-authentication/microsoft-authenticator/) | F (20/100) | United States (Five Eyes) | Authenticator app from Microsoft that generates one-time codes for any account and supports push approval, passwordless and passkey sign-in for Microsoft and Entra ID accounts. |
| [Twilio Authy](https://privacyratings.com/two-factor-authentication/twilio-authy/) | F (20/100) | United States (Five Eyes) | Two-factor authentication app from Twilio that generates one-time codes and supports push approvals, with encrypted cloud backups tied to a phone number. Available for Android and iOS. |

## Criteria

- **Open source** (weight 3): Is all the source code needed to run the product public?
- **No trackers or telemetry** (weight 3): Are the website and apps free of third-party trackers, with any analytics anonymous and any telemetry off by default?
- **No ads or data sales** (weight 2): Is the product funded without advertising, ad targeting or selling user data?
- **Independent audit** (weight 2): Has an independent security or privacy audit been published within the last three years?

Source: https://privacyratings.com/two-factor-authentication/