How Open is Open? A PaaS Scorecard

“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.

Cloud Foundry, DotCloud scored at the top with a B- on our open
PaaS criteria. OpenShift was a little behind with a C+. Despite the
fact that all three vendors claim to be Open PaaS, they still fall
short on some of our key criteria of open source. In many cases
they have announced the intent to provide for more choices and
openness in the future. Google App Engine and Force.com don’t claim
to be open, and not surprisingly scored a D and D-.

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