Empire vs Envoyer: What are the differences?

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; Envoyer: A brand new way to deploy PHP and Laravel applications with zero downtime. Envoyer deploys your PHP applications with zero downtime. Just push your code, and let Envoyer deliver your application to one or many servers without interrupting a single customer. In this series, we'll discuss each feature of Envoyer, demonstrating how to use them with a sample project.

Empire and Envoyer can be primarily classified as "Platform as a Service" tools.

Empire is an open source tool with 2.53K GitHub stars and 156 GitHub forks. Here's a link to Empire's open source repository on GitHub.