Heroku started focusing on supporting Ruby as the programming language of choice. Most features and samples deployed on Heroku were written in Ruby. Even the Heroku build system used Ruby build tools as the default toolkit for building and deploying web apps on Heroku. Soon, Heroku extended its language support to include more programming languages, thereby making it a true polyglot platform—one where you could write apps in any of the supported programming languages.

Besides Ruby, Heroku started supporting Java, Python, PHP, Clojure, and other languages. Heroku's support for these languages combined with Heroku's Plug and Play architecture has helped Heroku reach a much larger audience. Heroku has now evolved into one of the best choices for developing and deploying web apps very easily and quickly. Heroku has found followers of its polyglot approach across the developer community—from freelancers to larger web software companies trying to rapidly build useful web...