TL;DR: Either is a solid choice over SMS-based codes — if easy backup and multi-device access matter most to you, Authy has traditionally had the edge, though the gap has narrowed as both apps have added backup options.
Google Authenticator and Authy are two of the most widely used two-factor authentication apps, both generating time-based one-time codes for your accounts.
What to Look For
Both apps generate the same standard type of time-based codes and work with any service that supports app-based two-factor authentication, making them broadly interchangeable in terms of core function.
Key Differences
Authy offers encrypted multi-device sync and cloud backup out of the box, which makes recovering your codes easier if you lose your phone. Google Authenticator has added optional Google account backup in recent versions, narrowing a gap that used to favor Authy more clearly.
The Bottom Line
Either is a solid choice over SMS-based codes — if easy backup and multi-device access matter most to you, Authy has traditionally had the edge, though the gap has narrowed as both apps have added backup options.
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This pattern shows up elsewhere too — see Identity Guard vs Aura: Feature Comparison.
Frequently Asked Questions
What’s the short answer?
Either is a solid choice over SMS-based codes — if easy backup and multi-device access matter most to you, Authy has traditionally had the edge, though the gap has narrowed as both apps have added backup options.
What should I actually look for?
Google Authenticator and Authy are two of the most widely used two-factor authentication apps, both generating time-based one-time codes for your accounts.