4. Good Technology
CEO: King Lee
In the business since 2000, Sunnyvale, Calif.-based Good Technology has been a pioneer in the MDM market. Gartner analysts praise Good Technology's corporate containerization, which provides complete containerization of corporate data from the device owner's personal data. The company owns dozens of patents and intellectual property rights in enterprise mobility and synchronization, device and application management, Gartner said. Good Technology allows IT teams to manage third-party and internally developed applications. The company also supports two-factor authentication and email encryption through its Good Vault mobile identity and access management product.