What are some alternatives?
When comparing Google App Engine and Plesk, you can also consider the following products
Heroku - Agile deployment platform for Ruby, Node.js, Clojure, Java, Python, and Scala. Setup takes only minutes and deploys are instant through git. Leave tedious server maintenance to Heroku and focus on your code.
cPanel - With its first-class support and rich feature set, cPanel & WHM has been the web hosting industry's most reliable, intuitive control panel since 1997.
OpenShift - OpenShift gives you all the tools you need to develop, host and scale your apps in the public or private cloud. Get started today.
Dokku - Docker powered mini-Heroku in around 100 lines of Bash
Hostwinds - Hostwinds offers web hosting services and solutions.
AWS Lambda - Lambda is a cloud service that Amazon Web Services (AWS) provides, which allows developers to run serverless code.