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SingleSign vs Google Sign-In

In short

SingleSign vs Google Sign-In offers the same one-tap experience for your users, with one difference: no advertising business sits behind the identity.
SingleSign compared with Google Sign-In
 SingleSignGoogle Sign-In
One-tap sign-in for the userYesYes
Account belongs to the personYesYes
Operated by an advertising businessNoYes
Per-scope consent shown at sign-inYesYes
One place to review every connected appYesYes
Instant revocation by the userYesYes
Reach: users who already have an accountThe honest gap. Google Sign-In converts better today because almost everyone already has the account.GrowingEffectively universal
Free for your applicationYesYes
Works alongside other providersYesYes

SingleSign is an identity provider: the account belongs to the person and they bring it to your application, the way "Sign in with Google" works. Auth0, Okta and Firebase Authentication are customer identity platforms: your application owns its own user directory and you run sign-up, storage and recovery inside it. Neither model is better in the abstract — but they are different products, and most comparisons skip past that.

Choose SingleSign when

  • Your audience is sceptical of signing in with an advertising company.
  • You want to offer a privacy-first option next to the incumbent rather than instead of it.
  • You would rather your users be able to read, in plain language, what each app can reach.

Choose Google Sign-In when

  • Conversion at the sign-in step is the metric you are optimising above all others.
  • Your users are already deep in Google Workspace and expect that account.
  • You need Google API access — Drive, Calendar, Gmail — on the same consent.

Cost

Both are free to the application. Google Sign-In is funded by the wider Google business; SingleSign is not funded by advertising.

Pricing checked 2026-09-21. Providers change plans — verify before you commit: Google Identity Services, SingleSign privacy policy.

Free to try, and there is no user directory to set up.

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