Salesforce.com changed pricing for Force.com on 4 March 2013, from a per-user, per-month price to a price based on per application, per user, per month. Force.com user-based pricing had basically two options: Enterprise Edition ($50 per user, per month) and Unlimited Edition ($75 per user, per month). The primary differences between the two editions were based on object, tab, application and storage limits.
The new pricing enables customers to mix and match Light Application and Enterprise Application subscription types. This means a company could deploy a Light Application and Enterprise Application to the same user. It is important to note that Force.com continues to be packaged for no additional charge with Sales and Service Cloud for those same users. In a research note I just published Salesforce.com’s App-Based Pricing Benefits Some, but Is More Expensive for Others, I discuss the implications this price change has on existing and new salesforce.com customers.