4OTP vs Proton Authenticator
4OTP
4otp.com
Proton Authenticator
proton.meSide by side
| Figure | 4OTP | Proton Authenticator |
|---|---|---|
| Price from | $3/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | — | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| Plans published | 3 | 2 |
| Spec score · Authenticator apps | 8.5 (#22) | 8.8 (#9) |
| Code type | totp | totp |
| Encrypted backup | Yes | Yes |
| Free plan | Yes | Yes |
| Multi-device sync | Yes | Yes |
| Offline use | The apps can work offline without an account; an account is used for the optional Sync service. | The app can display your 2FA codes without an internet connection. |
| Purpose | 4OTP generates six-digit time-based one-time passwords that change every 30 seconds to help secure online accounts. | Proton Authenticator generates time-based, one-time 2FA codes on your device for an extra layer of account login security. |
| Support | The maker directs users to email [email protected] and says it will respond as quickly as possible. | The product page links to Proton product support. |
| Supported platforms | Windows,macOS,iOS,Android | iOS,Android,macOS,Windows,Linux |
Plans
In their own words
Proton Authenticator
Proton Authenticator generates time-based one-time codes for two-factor authentication, adding a code at login to help secure accounts. It can display codes without an internet connection, and a Proton Account is not required to use it. Signing in is optional and enables code syncing across devices. Users can import codes from Google Authenticator, 2FAS, Aegis Authenticator, Bitwarden Authenticator, Ente Auth, and LastPass Authenticator, then export their codes from the app. Backups can be stored locally or in the cloud, with end-to-end encrypted sync between devices. Proton says its servers cannot access synced data in unencrypted form; when sync is on, entries are protected with 256-bit AES-GCM. The app is open source, and its vault can be unlocked with face or fingerprint recognition. It is available for Android, iOS, Linux, macOS, and Windows; Android is also available through F-Droid. Proton Authenticator is free on all listed platforms, with no ads or tracking.