Google Authenticator & Microsoft Authenticator
The codes guarding everything else, kept by the companies you were guarding against.
Two-factor codes are the last thing standing in front of every account you own. Google Authenticator now syncs them to your Google account, which puts the spare keys in the same building as the front door. The alternatives here keep the secrets on your own device, or on a key in your pocket, and let you take a backup you actually control.
What you are replacing (5)
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Google Authenticator ↗
Mountain View. Codes now sync to the Google account they also protect.
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Microsoft Authenticator ↗
Redmond. Backs up to a Microsoft account.
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Twilio Authy ↗
San Francisco. Cloud sync, and the desktop apps were retired in 2024.
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Ente Auth ↗
Open source, end-to-end encrypted, servers in Europe — and a Delaware company. Its own privacy policy says it is headquartered in the USA.
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2FAS ↗
Polish team, and genuinely good. The company is Two Factor Authentication Service, Inc. of Lewes, Delaware.
European alternatives (4)
Suggest another →-
Proton Authenticator ↗
Geneva. Free, open source, no account required, and it runs on Windows, macOS and Linux as well as your phone.
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Aegis Authenticator ↗
Dutch and open source. Android only, everything stays on the handset, and the encrypted backup is yours — the part Google Authenticator does worst.
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Yubico Authenticator ↗
Stockholm. The secrets live on a YubiKey rather than on the phone, so a lost handset is not a lost account.
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Nitrokey ↗
Teltow, near Berlin. Open-source security keys, hardware and firmware both published for anyone to audit.
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