9. SuccessFactors, $420 Million (analyst estimates)
CEO: Lars Dalgaard
SAP bought SuccessFactors in December 2011 for $3.4 billion, adding cloud-based personnel-management applications to its portfolio. SuccessFactors focuses on a variety of HR-related functions, including payroll, collaboration, training, performance tracking, workforce analytics and recruiting, through cloud-based applications. The company's business execution software is intended to improve business alignment and performance while at the same time extending efficiencies through the use of the cloud. The industry is watching SAP and Oracle go head-to-head in this space.