HR in the cloud is a growing trend, with market forces pushing HR systems and processes to software-as-a-service (SaaS) models. However, SaaS alone does not address the need to outsource routine transaction processing and call center support. While SaaS solutions continue gaining traction, acquisitions by large vendors are also consolidating the market. Considerations for buyers include verifying capabilities for global payroll, integration, mobile access, and reducing customizations versus outsourcing transaction processing and help desk support through an HR business process outsourcing provider.