In this post, we attempt to define and score key criteria that should be used to measure and assess how well a particular Platform-as-a-Service (PaaS) offering meets the standard of “open”.
We examined five PaaS platforms: Cloud Foundry (from VMWare), DotCloud, Force.com, Google App Engine and OpenShift (from RedHat). We scored each against five criteria for openness: choice of infrastructure, choice of platform, portability, choice of support and open source licensing.
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