From their site: Notify! is a Web service that runs on a patented and proprietary interactive voice messaging (IVM) technology platform. Notify! empowers users in any industry to reach their customers with marketing and customer service voice messages. Notify! can follow dynamically created scripts for personalized communication in different voices and up to three different languages. Because Notify! is a Web service, you don't need any hardware or any software. Simply integrate the WSDL into you existing application, you can seamlessly and immediately automate your customer contact tasks without incurring any capital expense.