It is similar in that both allow you to create applications using web based editors but HyperDev focuses much more on simplicity. We start with the idea that ev

It is similar in that both allow you to create applications using web based editors but HyperDev focuses much more on simplicity. We start with the idea that everyone will experience their development environment from a web based interface in the future and try to design one as simple and powerful as possible. I'm not an expert c9 user, but from my experience with it it is much more about recreating existing development environments on the web. With HyperDev you don't need to pick a server OS or configure your environment to match your local, it is already set up and deployed. You just need to write the code.