What are some alternatives?
When comparing Amazon EC2 and Umbler, you can also consider the following products
DigitalOcean - Simplifying cloud hosting. Deploy an SSD cloud server in 55 seconds.
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.
Linode - We make it simple to develop, deploy, and scale cloud infrastructure at the best price-to-performance ratio in the market.
Microsoft Azure - Windows Azure and SQL Azure enable you to build, host and scale applications in Microsoft datacenters.
Vultr - VULTR Global Cloud Hosting - Brilliantly Fast SSD VPS Cloud Servers. 100% KVM Virtualization
Dokku - Docker powered mini-Heroku in around 100 lines of Bash