Koa was created by the very same person as Express itself [https://github.com/tj https://github.com/tj] TJ Holowaychuk. The initial idea is to do the next leve

Koa was created by the very same person as Express itself [https://github.com/tj https://github.com/tj] TJ Holowaychuk. The initial idea is to do the next level express framework using back-then generator functions. What is missing ( for me ) is the smaller community and popularity. So it makes it tough to argue about the business impact between choosing koa over express. Honestly, being a nodeJS freelancer for the last decade there was not a single project, where koa was in use. Mostly I've seen express or sailsjs [http://sailsjs.com http://sailsjs.com] which is quite a full-blown MVC Rails style solution.