Salesforce.com, the enterprise cloud computing company has announced it has entered into a definitive agreement to acquire Rypple, a cloud-based social performance management company. The acquisition signifies salesforce.com’s entry into the human capital management (HCM) market for the social enterprise.

Salesforce.com plans to re-launch Rypple as “Successforce” and create a new HCM business unit, which will be run by John Wookey. Rypple’s unique social technologies will also extend the value of salesforce.com’s existing core products. The transaction is expected to close in salesforce.com’s fiscal first quarter ending April 30, 2012, subject to customary closing conditions.

“Salesforce.com and Rypple share a vision for extending the social enterprise to transform the way we work,” said Marc Benioff, chairman and CEO, salesforce.com. “The next generation of HCM is not just about a cloud delivery model, it’s about a fundamentally better way to recruit, manage and empower employees in a social world.”