Alex Casillas is associated with OTPfy, which can be accessed at https://otpfy.com. OTPfy is a service platform that offers solutions for enhancing online security and authentication processes. The primary focus of OTPfy is to provide one-time password (OTP) services, which are used for secure user verification. The platform aims to facilitate businesses in strengthening their security measures by offering reliable OTP integration that can be customized to meet specific needs.