"I still think Heroku is by far one of the easiest PaaS providers to get started with, but it is clear that if you are a Rails shop with heavy traffic, you'll want to go towards a more [infrastucture-as-a-servce]-like offering as you'll have more control over scalability and cost," wrote Andrew Glover, chief technology officer of App47, a mobile enterprise application intelligence service provider, in an email.
Others agreed that Rap Genius should have found another service to better fit its needs. Industry observer Matt Asay, a vice president of corporate strategy database provider 10Gen, criticized how Rap Genius handled its complaint.
"Seriously, what was RapGenius' point? Did fuming and shaking fists solve its problem? There's an easy solution: pay for a different service," wrote Asay in a Twitter message.
Heroku is one of a number of platform-as-service providers -- others include Google, CloudBees and Engine Yard -- that offer a hosted software stack for running online applications. The company first offered Ruby on Rails as a hosted service, but has expanded to offer other technologies as well, including Node.js, Clojure, Java, Python, and Scala.