The Twizo Go SDK connects to the Twizo API using PHP. This API includes functions to send verifications such as 2FA, SMS, and Number Lookup. Developers can create a Twizo account at https://register.twizo.com/
TeleSign has greatly enhanced the iOS SDK for its App Verify service. The SDK allows app developers to handle verification completely in the background without multiple steps required for an onboarding user. By simply entering a phone number, the app exchanges with the phone for verification.