The Voice Verify API delivers patented phone-based verification and two-factor authentication (2FA) using a one-time passcode (OTP) sent over voice message. It allows you to send voice messages for account security and business critical communications. Some features include; Send custom messages, Send standard or custom messages containing a random verification code, Send standard or custom messages in a variety of languages and more. TeleSign provides a way to build communications and account security into your web and mobile apps. It is a cloud communications platform that empowers Web and mobile app developers the ability to build powerful and secure communication products using a dynamic platform with a large global network. TeleSign supports numerous use cases from SMS and voice messaging, two-factor authentication (2FA), one-time passwords (OTPs), data intelligence, fraud scoring and more.