Proton Authenticator

Open source and available on every device. Securely sync and backup your 2FA codes easily.

Built by Proton

100M+

Protect your accounts with trusted security by Proton.

Get codes on desktop or mobile, even offline.

Easily import your existing codes and enable secure backups.

Lock your app with biometrics or PIN for extra security.

How Proton Authenticator works

Just download the app, scan your QR codes or import existing codes, and you’re set. You don’t need a Proton Account to use it.

Step 1

Download the authenticator app

Get Proton Authenticator for your device. You can sign in to your Proton Account if you want to sync 2FA codes across your devices, but login isn’t required.

Step 2

Enable 2FA on your accounts

When you enable 2FA on an account, the website or app will provide you with a QR code or a secret key. Scan the QR code or enter the key into Proton Authenticator. You can also import tokens from another authenticator.

Step 3

Use codes to securely log in

Proton Authenticator will generate a new 6-digit code every few seconds. When logging in to an account, enter the code as an extra layer of security.

What is an authenticator app?

Two-factor authentication (2FA) adds a second layer of login security to your accounts, in addition to your password. Even if hackers know your password, they can’t access your account without this second code. An authenticator app generates one-time codes right on your device — safer and quicker than having codes sent by email or SMS.

Proton Authenticator is an open source and end-to-end encrypted 2FA app that’s simple and free to use. It is available on all platforms, including desktop. Easily sync or back up your 2FA codes so you never lose access to your accounts.

Learn about our security

The authenticator that puts you first

Other authenticator apps focus on locking you into Big Tech ecosystems or serving you ads. Proton Authenticator is different. It has no ads, no trackers, and is open source, so you can verify its code. See how easy 2FA can be when your security and privacy are the priority.

features	Proton Authenticator	Google Authenticator	Authy	Microsoft Authenticator	DUO
Open Source
Encrypted sync
No ads or tracking
Platform availability	Android, iOS, Windows, Mac, Linux	Android, iOS	Android, iOS	Android, iOS	Android, iOS
Direct export

Unlock full account security with Proton Pass

Log in to your accounts quickly and safely, create email aliases to protect your privacy, and monitor the dark web to see if your data has been breached. Take greater control of your account security with our password manager, Proton Pass.

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Entrust your 2FA with a privacy-first provider

Proton Authenticator is built by the team behind Proton Mail.

With open-source code, end-to-end encryption, and no data collection, it’s a 2FA app you can actually trust.

Founded in 2014, Proton is owned by a nonprofit dedicated to building a better internet where privacy is the default.

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Download for all your devices

Use Proton Authenticator on mobile and desktop. Sync your codes securely across devices with your Proton account for easy access. Or back them up locally or in the cloud for safe keeping. It’s your choice.

Frequently asked questions

Is Proton Authenticator free?: Proton Authenticator is completely free to use on all platforms. No ads and no tracking.
Can I import my 2FA codes from other authenticator apps?: Yes, Proton Authenticator supports easy import from various authenticator apps including Google authenticator, 2FAS, Aegis Authenticator, Bitwarden Authenticator, Ente Auth, LastPass Authenticator. You can also export your codes from Proton Authenticator.
Do I need a Proton Account?: No, you can use Proton Authenticator without an account. If you do have a Proton Account, you can sync your codes securely across devices. They’re protected by end-to-end encryption, so nobody but you can access them.
What if I lose my phone or switch devices?: You can export your codes and back them up safely. Proton Authenticator supports encrypted backups and easy transfers.
Is Proton Authenticator open source?: Yes. all Proton apps, including Proton Authenticator, are fully open source. Anyone can inspect and verify our code.
How is this different from Proton Pass?: Proton Pass is a password manager designed to securely generate and store strong passwords, and protect your digital identity with features like email alises and dark web monitoring. It also includes an integrated authenticator that can store and autofill 2FA codes - but not the ones used to log in to your Proton account. Proton Authenticator is a standalone 2FA app that allows users to enable 2FA protection for their Proton account, it also allows users to store their 2FA codes separate from their passwords if they wish to do so.