According to a September, 2009 Gartner Group report, Force.com had over 1,000 customer accounts, in addition to tens of thousands that used Force.com in conjunction with Salesforce.com. Force.com uses eight data centers, with each customer fully contained in a single data center that is replicated for availability.
Several criticisms of force.com's integrated development environment and developer friendliness have been made, including lack of support for multiple developers, speed problems with developing on the cloud, and a failure to properly separate Salesforce.com from Force.com. The platform has been described[by whom?] as having potential but currently only appropriate for Salesforce.com customers who want to extend Salesforce, not for independent developers who want to use Force.com as a standalone platform.