The same FIDO U2F Security Key or YubiKey you use for Gmail or G suite can also be used with your other U2F-enabled accounts. This also means that you can use the same YubiKey at home and at work. To see where else you can use your FIDO U2F Security Key, see our FIDO U2F page or our enterprise integrations page, https://www.yubico.com/support/partners/#FIDO-U2F

The same FIDO U2F YubiKey can be used with any number of services and there is no practical limit to the U2F-secured services the Security Key and other U2F-certified YubiKeys can be associated with.