Many large companies choose to host all of their Web conferencing needs in house. Such software/hardware sits on your company's network and phone system, where you can then use its features to conduct audio and Web conferencing.
Simple administration tools make it easy to integrate Web conferencing software solutions into any business. It is easy for everyone to share files and allows you total control over the system. This may be most beneficial to those companies who are dealing with sensitive information and need a certain level of security within their Web conferencing software solution.