In the open source cloud space, OpenStack, the initiative co-instigated five or so years ago by NASA and Rackspace, has the lion’s share of the attention. Indeed, you would be forgiven for thinking that there is no other open source cloud operating system other than OpenStack. But in thinking that you’d be wrong. You see, before OpenStack was even a thing, a small startup called was founded to create a cloud operating system to be a kind of a “private Amazon Web Services.” was acquired by Citrix back in 2011, renamed CloudStack, and thereafter decided to donate the software as an open source project under the Apache Software Foundation.

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Ben Kepes

Ben Kepes is a technology evangelist, an investor, a commentator and a business adviser. Ben covers the convergence of technology, mobile, ubiquity and agility, all enabled by the Cloud. His areas of interest extend to enterprise software, software integration, financial/accounting software, platforms and infrastructure as well as articulating technology simply for everyday users.