As Ruby on Rails agency, we are very excited about new materials that prove how cool Ruby on Rails is. (We already know that, but for some of you, reasons still should be provided). RoR is an effective platform for developing web and cloud applications. There are at least 865,472 websites running on Ruby on Rails, and the number is growing. As you all know Ruby on Rails was created to promote programmer happiness, which means programmers are more productive and more efficient developing in Ruby on Rails than on other platforms such as .NET and Java. Let’s explore the effectiveness of the framework with 5 RoR commercial use cases.