[vectorpush]

meh, I'm not convinced. I've written some very complex APIs and sinatra-contrib covers most ancillary needs. I'm not saying Rails is always the wrong choice for an API, but most of the bullet points listed in this guide are covered or unnecessary. If you have tons of sprawling back-end logic that is exposed through your API, Rails makes sense, but time and time again I've seen first-hand how much more quickly Sinatra gets us up and going and it's always less work for new developers to grok the application flow.