While Salesforce.com's the unquestioned SaaS revenue leader, Taleo, RightNow, NetSuite and SuccessFactors are all closing in on annual run rates of $200 million. With SuccessFactors this week reporting 27% quarterly revenue growth to $46.8 million, these and other high-growth SaaS vendors have proven they've got industrial-strength enterprise chops.

For SuccessFactors—the creator of the "business-execution software" category that promises to help companies interlace strategy and execution—that nice jump in revenue was paired with a 35% increase in billings, all of which caused the company to raise its guidance for the full year to somewhere between $198 million and $200 million.

SOURCE: http://www.informationweek.com/blog/main/archives/2010/07/successfactors_1.html