What are some alternatives?
When comparing Heroku and Cloudtrek, you can also consider the following products
Microsoft Azure - Windows Azure and SQL Azure enable you to build, host and scale applications in Microsoft datacenters.
Rackspace - More than 100,000 businesses trust Rackspace with their hosting and cloud computing. Get cloud, managed and hybrid hosting all backed by Fanatical Support.
DigitalOcean - Simplifying cloud hosting. Deploy an SSD cloud server in 55 seconds.
Cloudant - A scalable JSON document database for web, mobile, IoT and serverless applications.
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
AWS - Amazon Web Services offers reliable, scalable, and inexpensive cloud computing services. Free to join, pay only for what you use.