CNNMoney.com
Appirio in San Mateo offers a similar invite feature as software-as-a-service, but only for customers of Salesforce.com (CRM). The firm, which is backed by Salesforce, Sequoia Capital and GGV Capital, offers applications that manage referrals in social networks, whether for hiring purposes or a marketing campaign. All the data is sent back to Salesforce for analysis and tracking.