12. Simon Crosby
Co-Founder, CTO, Bromium
Developed under Crosby's guidance, Bromium's vSentry security technology has quickly gained the attention of security experts since its September 2012 launch. Crosby and company are addressing the increased security risks posed by cloud computing and BYOD using what the company calls "micro-virtualization" technology that isolates vulnerable or untrusted user tasks. It also puts the startup way ahead of established security vendors.