# Proton Authenticator privacy rating

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.

## Summary

Proton Authenticator scores 65 out of 100 (grade C) on the two-factor authentication criteria. It meets 2 of 4 criteria: open source and no ads or data sales. It partly meets no trackers or telemetry. It does not meet independent audit. It is based in Switzerland: Not in the Five, Nine or Fourteen Eyes; GDPR-style data protection law.

- Website: https://proton.me/authenticator
- Source code: https://github.com/protonpass/android-authenticator
- License: GPL-3.0
- Jurisdiction: Switzerland. Not in the Five, Nine or Fourteen Eyes. GDPR-style data protection law.
- Home page trackers: none found
- Category: [Two-factor authentication](https://privacyratings.com/two-factor-authentication/)
- Also rated: [Proton Mail](https://privacyratings.com/email-providers/protonmail/) (Email providers), [Proton Pass](https://privacyratings.com/password-managers/protonpass/) (Password managers), [Proton VPN](https://privacyratings.com/vpns/protonvpn/) (VPN providers), [Proton Calendar](https://privacyratings.com/calendars/proton-calendar/) (Calendars), [Proton Docs](https://privacyratings.com/office-suites/proton-docs/) (Office suites), [Lumo](https://privacyratings.com/ai-assistants/lumo/) (AI assistants), [Proton Drive](https://privacyratings.com/cloud-storage/proton-drive/) (Encrypted cloud storage)
- Grade: C (65/100)

## Criteria

| Criterion | Answer | Note | Evidence |
| --- | --- | --- | --- |
| Open source | Yes | GPL-3.0. | https://github.com/protonpass/android-authenticator/blob/main/LICENSE |
| No trackers or telemetry | Partial | No third-party analytics, but Proton apps share usage statistics and crash reports by default, and these can be turned off in settings. | https://proton.me/support/share-usage-statistics |
| No ads or data sales | Yes | Free with no ads. Proton is funded by paid plans. | https://proton.me/authenticator |
| Independent audit | No | No independent audit is published. |  |

Source: https://privacyratings.com/two-factor-authentication/proton-authenticator/
Edit: https://github.com/privacyratings/privacyratings.com/edit/main/ratings/two-factor-authentication/proton-authenticator.md