Google Authenticator and Authy are the two most widely used TOTP apps. Both generate the same codes — the difference is everything else around them.
Quick Comparison
Account Backup
Google Authenticator: Now supports encrypted Google account backup. Before 2023, it offered no cloud backup — losing your phone meant losing all your 2FA tokens permanently.
Authy: Has offered encrypted cloud backup since launch. Your tokens are restored instantly on any new device by logging in with your Authy account.
Winner: Authy — the backup experience is more mature and reliable.
Multi-Device Support
Google Authenticator: Codes are stored on one device. You can export/transfer, but it's not designed for simultaneous multi-device use.
Authy: Supports multiple devices simultaneously. Access your codes on your phone, tablet, and desktop at the same time.
Winner: Authy
Security Features
Google Authenticator: No app lock. Anyone who picks up your phone can see your codes.
Authy: Supports PIN lock and biometric lock. Can be protected so codes are only visible after authentication.
Winner: Authy
Privacy
Google Authenticator: If you use Google account backup, your encrypted token data is stored by Google. If you skip backup, it's fully offline.
Authy: Requires a phone number and Authy account. Token data is stored on Twilio's (Authy's parent company) servers, encrypted with your password.
Winner: Google Authenticator (with backup disabled) — no account required, offline by default.
The Verdict
Choose Authy if: You want cloud backup, use multiple devices, and want app-level PIN/biometric protection. Best for most users.
Choose Google Authenticator if: You prefer simplicity, already use Google, or want an offline-by-default experience without creating another account.
Neither option? 2faco.com generates TOTP codes in your browser — no app download or account required.
The Core Difference
Both apps generate standard TOTP codes that work with any service — the choice between them does not affect compatibility. The key difference is backup and sync: Google Authenticator relies on cloud backup through your Google Account (enabled by default since 2023), while Authy has offered encrypted multi-device cloud sync since its launch. If you are comfortable with Google having an encrypted copy of your 2FA secrets, Google Authenticator's backup now works reliably. If you want multi-device access or prefer Twilio's infrastructure, Authy remains the stronger choice for power users.
Google Authenticator — Strengths and Weaknesses
Strengths: Simple interface with no clutter, Google Account cloud backup means your codes survive phone loss, available on iOS and Android, trusted brand. Weaknesses: Until 2023, had no backup at all — many users lost accounts when phones broke. The new cloud backup is tied to your Google Account, so if that is compromised, your 2FA seeds could theoretically be exposed. Does not support multiple devices simultaneously. No PIN lock inside the app itself.
Authy — Strengths and Weaknesses
Strengths: Encrypted cloud backup that works across multiple devices (phone + tablet + desktop app), supports PIN/biometric lock inside the app, desktop app available for Mac, Windows, and Linux, allows backups without tying to a Google Account. Weaknesses: Account recovery tied to your phone number — if you lose the number without having another device set up, recovery requires contacting Twilio support. Slightly more complex interface than Google Authenticator.
Which Is More Secure?
Neither is significantly more secure than the other for everyday use. Both generate identical TOTP codes. The security trade-off is about backup: storing your 2FA secrets in the cloud (either Google's or Authy's encrypted servers) adds convenience but introduces a theoretical cloud-side risk. For the vast majority of users, the risk of losing a phone with no backup far outweighs the risk of cloud compromise. Having backups enabled in either app is the right default.
Can I Switch Between Them?
Yes, but it requires re-enrolling each account. There is no direct export from Google Authenticator to Authy or vice versa. To switch, go into each service's 2FA settings, disable the current authenticator, and re-scan a new QR code with your target app. This is time-consuming for accounts with many 2FA entries but is the correct process — do not try to share QR codes or secret keys via screenshots, as this creates a security risk.