Authenticator Apps Compared: Google Authenticator, Microsoft Authenticator and Authy
Three well-known authenticator apps all generate sign-in codes, but they differ sharply in how they back codes up, move them to a new phone, and help recovery.
Three well-known authenticator apps all generate sign-in codes, but they differ sharply in how they back codes up, move them to a new phone, and help recovery.
Key points
- Google Authenticator syncs codes to your Google Account when you sign in, and can also be used without an account, with manual transfer instead.
- Microsoft Authenticator backs up one-time codes, but restores only on the same device type, and work or school credentials are not backed up.
- Authy is built around multi-device use and encrypted backups, but recovery depends on keeping your backups password — Twilio never stores it.
Choosing an authenticator app feels small until your phone is lost and every account is waiting behind a code you cannot reach. Then the differences stop being technical and start being personal. Our pillar guide, Two-Factor Authentication Explained, covers prompts, apps, security keys and backup codes together; here we compare the three best-known apps directly, using only Google, Microsoft and Twilio’s own support pages.
Google Authenticator is the simplest option, and signing in syncs your codes to your Google Account
Codes work offline, sync is optional, and manual transfer exists if you stay signed out.
Google says the app generates one-time codes for sites and apps supporting Authenticator app 2-Step Verification, and that codes still work without internet or mobile service. That offline behaviour is the core job, done plainly.
The important choice is sync. You can synchronise codes across all your devices simply by signing in to your Google Account, and Google encrypts them in transit and at rest. Sign in on a new device and your codes sync to it automatically. Sync needs version 6.0 or above on Android or 4.0 or above on iOS, and the app needs Android 6.0 or above. It can also sync codes for multiple Google Accounts on one device. Prefer not to link codes to an account? You can use the app without one and transfer codes manually, by scanning a QR code from your old device. Privacy Screen can also require a PIN, pattern or biometric prompt before the app opens.
Microsoft Authenticator suits Microsoft accounts best, and its backup comes with a same-platform rule
One-time codes are backed up, but passwordless and work or school credentials are not.
Microsoft Authenticator backs up one-time codes for eligible Microsoft personal and third-party accounts such as LinkedIn and Facebook. On Android, you turn on Cloud Backup in Settings and select a Microsoft personal account to store it. From January 2027, Android backup will instead be enabled from Google One backup.
Read the limits carefully — they decide whether a new phone is a five-minute job or a long afternoon. Backup and restore work only on the same device type: an iOS backup cannot be restored on Android. A code refreshing every 30 seconds is backed up and available after restore. A passwordless credential is not — only the name is saved, and you sign in again after restoring. Work or school credentials are not backed up either; only the name is saved, and you must register again.
Its FAQ says Authenticator is not available for PC or Mac. Sign-in notifications work for Microsoft personal and work or school accounts, but not for third-party accounts such as Google or Facebook. And Autofill was discontinued in mid-August 2025, with the Chrome extension retired on 14 December 2024 — do not choose this app today expecting it to fill passwords; a dedicated password manager remains a separate decision.
Authy is built for more than one device, with backups protected by a password only you hold
Tokens are encrypted with your backups password before they sync, and losing it can lock the backup away.
Twilio describes Authy as allowing you to back up and sync 2FA tokens across multiple devices and device types — phones, tablets and computers — and its backup instructions cover the Android and iOS apps. Once backups are enabled, you set a password that creates a secure key for encrypting your tokens; once encrypted, tokens can be synchronised to another device, then unencrypted with that same password.
That design is Authy’s strength and its warning label in one. Twilio states that the backups password is never sent to or stored on its servers, so write it down somewhere safe; without it, you may be unable to decrypt synchronised tokens. Twilio’s reinstall guidance, summarised in its Help Center listing, adds: before reinstalling or moving device, ensure Multi-Device and Backups are enabled and you know that password. Reinstall without another Authy installation, with Multi-Device disabled, and you will need Twilio’s account recovery process.
Side by side, the backup and recovery rules matter more than the code screen
The table compares only the platform, backup, multi-device, extra-feature and recovery points verified from official pages.
| Feature | Google Authenticator | Microsoft Authenticator | Authy (Twilio) |
|---|---|---|---|
| Platform availability | Android and iOS; sync needs app 6.0+ (Android) or 4.0+ (iOS) | Smartphone app; not for PC or Mac | Android and iOS apps; tokens sync across phones, tablets and computers |
| Cloud backup / sync | Google Account sync, encrypted in transit and at rest; account-free use possible | Cloud Backup to a Microsoft personal account (Google One from Jan 2027) | Tokens encrypted with a key from your backups password, then synced |
| Multi-device support | Yes, via Google Account sync | Backup/restore only, same device type only | Yes — enable Multi-Device before moving or reinstalling |
| Extra features (verified) | Works offline; Privacy Screen lock | Microsoft-account notifications; Autofill discontinued Aug 2025 | Backups password never stored by Twilio |
| Account recovery / new phone | Codes sync automatically, or QR transfer from old device | Codes restore; passwordless and work/school save only the name | Needs Backups + Multi-Device on and your password, else Twilio recovery |
In short: Google ties convenience to your account, Microsoft to its account and platform, and Authy to a password only you hold.
What this means
The best app is the one whose recovery works on your worst day, not your best.
Most of us choose an authenticator app in a calm moment, because a website told us to scan a QR code and we reached for the first name we recognised. The choice gets tested later, on a much worse day: a phone dropped in water, a bag taken on a train, or a new handset on the table while the old one has already been wiped. Anyone who has stared at a sign-in screen thinking, “But I did set up two-factor — why can I not get in?” knows that sinking feeling. The security did its job. It just did it against you.
That is why, in our view, you should choose backwards — recovery story first, icon second. If your life runs through a Google Account and you want the plainest route to a new phone, Google’s sync is genuinely reassuring: sign in on the new device and your codes follow, provided you set it up while you still had the old one. If your important sign-ins are mostly Microsoft accounts, Microsoft Authenticator makes sense, but go in with eyes open — stay on the same platform when you change phones, and expect work or school accounts to register again. If you like codes on a second device rather than depending on one handset, Authy has real appeal, so long as you treat its backups password like a spare house key: written down, kept safe, never left to memory alone.
Whichever app you pick, do the boring five minutes now, while nothing is wrong. Turn the backup or sync on. Check which account or password it depends on. Save each service’s backup codes somewhere separate from the phone — a password manager is a sensible home for them. Then a phone change becomes dull in the best way: install, restore, sign in, carry on. Security that only works when life goes perfectly is not really finished. Security that survives a lost phone and a bit of human forgetfulness — that is the kind worth having, and all three apps can give it to you if you set up recovery before you need it.
Bottom line
Google for simplicity, Microsoft for Microsoft accounts, Authy for multi-device use — set up recovery today.
In our view, Google is the simplest choice for anyone happy to sign in to a Google Account, Microsoft fits readers centred on Microsoft accounts who accept its same-platform rule, and Authy suits multi-device users who will guard its backups password carefully. The preparation matters more than the pick: enable the backup, note what it depends on, and keep recovery codes off the phone itself.
Related Guides
Go deeper on two-factor methods and recovery codes.
Read Next:
- Two-Factor Authentication Explained: Prompts, Authenticator Apps, Security Keys and Backup Codes
- Password Managers Explained
Sources
Primary Google, Microsoft and Twilio pages, accessed 9 November 2026.
