Why it's similar
Both are first-party authenticators from major tech companies that generate 2FA codes for countless services. Reviewers of Microsoft's app frequently mention switching to or from Google's as the most direct comparison.
How it differs
Google Authenticator added cloud backup that survives a phone switch, which Microsoft users say their app fumbles for Microsoft 365 keys. It carries a higher 4.85 rating across over a million reviews, though it lacks Microsoft's passwordless push sign-in.
