What are some alternatives?
When comparing AWS Lambda and Dokku, you can also consider the following products
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
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.
Google Cloud Functions - A serverless platform for building event-based microservices.
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.
Azure Web Apps - Create and deploy mission critical Web apps that scale with your business
Microsoft Azure - Windows Azure and SQL Azure enable you to build, host and scale applications in Microsoft datacenters.