You can use SnapID internationally if you have a Google Voice number. You'll send a text message using the Google Voice website instead of your phone. These numbers are free and take just a few minutes to set up. If you travel internationally often, we suggest you use a Google Voice Number with SnapID instead of your regular phone number.
If you're a website admin and would like to allow international users to login with SnapID from mobile phones that don't have US numbers please contact us directly for details.