Its ease of use and deloyment, plus its ability to integrate existing Web infrastructures, allows developers to focus their time on the difficult tasks of UI design and audio creation. Because VoiceXML is an open standard, it provides benefits that proprietary solutions can't. Open standards encourage many different vendors to provide solutions and services-from developer tools, to reusable components, to outsourced development services. An open standard enables an industry to be built around the standard, not a division in a company. An XML-based open standard transmitted over HTTP also encourages sharing of ideas and code.
Developers can easily share, modify, and reuse code.
The developer community can easily grow and this growth, in turn, will generate more sharing of ideas and code. Proprietary solutions encourage contained development, which limits its rate of adoption. It also provides development resources such as interactive debugging tools, reference guides, and code and grammar samples. Additionally, with an open standard, developers are not tied to a specific vendor's platform. And, the VoiceXML execution model is better suited to integration with externally hosted data.