Heroku Meets Azure – The Easiest Way to Deploy Your Rails App on Azure
Heroku pretty much created the gold standard of Platform as a Service (PaaS) web deployments for open source web stacks based on Ruby, Python, Node and Php.
Although Azure Websites has support for .NET and mostly supports PHP, Node, and Python it has no support for Ruby. In addition somethings like native modules are not supported on the platform.
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