Best Identity Verification APIs in 2026: Phone, Email, VAT, and Device Validation Compared
October 29, 2026
A signup form can accept an email address that doesn’t exist, an invalid phone number, or a VAT number that doesn’t match a registered business. Basic format checks aren’t always enough to determine whether user-submitted information can be trusted.For developers building signup, checkout, or KYC flows, validating user data requires more than basic checks. A phone validation API…