What are some alternatives?
When comparing Umbler and Dokku, 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.
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Microsoft Azure - Windows Azure and SQL Azure enable you to build, host and scale applications in Microsoft datacenters.
Google Cloud Functions - A serverless platform for building event-based microservices.
DigitalOcean - Simplifying cloud hosting. Deploy an SSD cloud server in 55 seconds.
Azure Web Apps - Create and deploy mission critical Web apps that scale with your business