By Ilya Grigorik on April 14, 2011 Platform as a Service (PaaS) is not a trivial thing to build, deploy, or maintain: first you have to orchestrate all the services internally, then you have abstract all of that work behind a facade, and finally, you have to market, sell it, and maintain it. Not surprisingly, an investment that large has been the domain of only a few well-funded companies. Hence,