The company also has more than 46 clients with more than 10,000 users each. Salesforce has two clients, Cisco and Dell, with 15,000 subscribers.

Of course, the fee structure is different than that of Salesforce with the average fee being about US$40 to $60 per employee per year rather than per month.

The Next Lab is available now.

If SuccessFactors is emblematic of how big SAAS can grow, the announcement this week from Kana Software showed off the increasing number of solutions that SAAS can touch in an enterprise.

Kana announced this week that it has taken its on-premise knowledge management system, Kana IQ, and re-created it for the SAAS model.