Atlantis vs Empire: What are the differences?
Atlantis: Open Source PaaS Built on Docker, by Ooyala. Atlantis is an Open Source PaaS for HTTP applications built on Docker and written in Go. It makes it easy to build and deploy applications in a safe, repeatable fashion, and flexibly route requests to the appropriate containers; Empire: A Self-Hosted PaaS Built on Docker and Amazon ECS. Empire is a control layer on top of Amazon EC2 Container Service (ECS) that provides a Heroku like workflow. It conforms to a subset of the Heroku Platform API, which means you can use the same tools and processes that you use with Heroku, but with all the power of EC2 and Docker.
Atlantis and Empire belong to "Platform as a Service" category of the tech stack.
Atlantis and Empire are both open source tools. Empire with 2.53K GitHub stars and 156 forks on GitHub appears to be more popular than Atlantis with 381 GitHub stars and 33 GitHub forks.