HealthCrowd's DH*RMA platform is a full-service enterprise engagement platform using dynamic persuasion messaging and multivariate testing to optimize patient engagement. The platform is able to deliver messages through multiple mediums, including instant message, email, voice, social, and other mobile applications. By using multivariate testing, HealthCrowd is able to dynamically serve patient populations, altering message delivery and content to derive the right message, to the right patient, at the right time.