PrivacyTools.io
Reviewed by Marco Wollank
Replace today: Google Authenticator Microsoft Authenticator Authy

Best Free 2FA & Authenticator Apps in 2026

Private alternatives to Google Authenticator, Microsoft Authenticator, Authy, vetted against our public criteria.

Grouped by threat level

Covered Easy start and good defaults for everyone
Hardened Some setup and real gains for the willing

How they compare

Tool Backup Cost
ente Authenticator 		E2EE cloud Free
Aegis Authenticator 		Local export Free
Yubico Authenticator 		On hardware key ·
2FAS 		Encrypted cloud Free
Tofu 		None Free
Raivo OTP 		E2EE cloud Free

Two-factor authentication adds a second layer of protection on top of your password. Even if someone steals your login, they still need the rotating code from your authenticator app to get in. The open-source apps below keep those codes on your own devices, with encrypted backups and a clear export path, so a leaked password is not enough to take over an account and you are never locked into one platform.

Why you can’t just rely on Google Authenticator’s defaults

The authenticators baked into the big platforms tie you to an account rather than to an open standard. Google Authenticator long shipped with no backup at all, so a lost phone meant re-enrolling every site by hand, and its newer cloud sync routes your codes through the same account that already tracks the rest of your life. Authy locks your tokens inside a proprietary cloud with no clean export, which is the trap to avoid. The fix is not a hidden setting. It is an app built around the portable TOTP standard, where your codes belong to you and travel with you.

How we pick

Every app here is measured against our public listing criteria. We require open source so the code generating your codes can be independently inspected, an encrypted backup or a real export path so a lost device never means lost accounts, and offline operation so the app never has to phone home to work. We weigh how easy each one makes day-to-day use, because a second factor people abandon protects nothing. We only list an authenticator we would happily trust with our own logins, and we say plainly where each one compromises.

What to look for in an authenticator app

Four things matter. First, open source, so the security is verifiable rather than a promise. Second, an encrypted backup or token export, so losing your phone is recoverable instead of catastrophic. Third, the platforms you actually use, since an app that runs on your phone but not your laptop forces you to reach for the phone every login. Fourth, offline code generation, so the app works without a network and has no excuse to talk to a server. Aegis Authenticator on Android and Ente Authenticator across platforms are good examples of all four in one place.

Is an app really safer than texting me a code?

Yes, and the gap is wider than it looks. A texted code is a secret in transit, and anything in transit can be intercepted, phished onto a fake page, or stolen outright through a SIM-swap that hands your number to an attacker. A code generated on your device never leaves it until you type it, so there is nothing to intercept. The one weakness apps share with codes is the fake-login-page trick, where you are fooled into typing a real code into an impostor site. If that is your worry, a hardware security key closes it, because the key checks the web address before it responds.

How to switch

Open the new app, then visit the security settings of your most important accounts, email first, and choose to add an authenticator. Each site shows a QR code during setup. Scan it, confirm the first generated code, and that account is protected. Work through your logins over a week rather than all at once, and turn on the encrypted backup before you go far, so the move is reversible. If you are leaving the platform authenticators specifically, the same step replaces Google Authenticator one site at a time, and pairing your authenticator with a strong, unique password on every account is what makes the second factor count.

Frequently asked

Is an authenticator app better than SMS codes?
Yes. Codes sent by text can be intercepted or stolen through a SIM-swap, where an attacker convinces your carrier to move your number to their phone. An authenticator app generates the code on your own device, so there is nothing travelling over the network for anyone to grab in transit.
What happens if I lose the phone with my authenticator on it?
That depends entirely on whether you set up a backup first. An app that keeps an encrypted backup of your tokens, or that lets you export them, turns a lost phone into an inconvenience rather than a lockout. Without one, you fall back to each account's recovery codes, which is why saving those matters too.
Can I move my codes from Google Authenticator to a different app?
Usually yes, because almost every authenticator uses the same open TOTP standard. Some apps offer a transfer or QR export to carry your accounts across, and where that is missing you re-enrol each account by scanning its setup code again. Your tokens are never locked to one vendor by the standard itself.
Do authenticator apps need an internet connection to work?
No. A TOTP code is calculated from a shared secret and the current time, both of which live on your device, so the app generates valid codes with the phone in airplane mode. A connection is only needed for optional cloud sync, not for the codes themselves.
Is it safe to keep my passwords and my 2FA codes in the same app?
It is convenient, but it weakens the point of a second factor, because one breached vault then exposes both factors at once. Keeping codes in a separate authenticator means a leaked password alone is not enough to get into your accounts. Many people accept the small extra friction for that separation.
How many accounts can I protect with one authenticator app?
As many as you like. Each account adds one more entry to the list, and the app handles dozens or hundreds without trouble. Adding a new one is the same quick step every time: scan the site's QR code during setup, confirm one generated code, and it is enrolled.