AppScale vs Flynn: What are the differences?

What is AppScale? An open source implementation of Google App Engine. Run your applications in any cloud- public, private or hybrid. AppScale is a platform that allows users to deploy applications developed using the Google App Engine APIs over Amazon EC2, Rackspace, Google Compute Engine, Eucalyptus, Openstack, CloudStack, as well as KVM and VirtualBox.

What is Flynn? Next generation open source platform as a service. Flynn lets you deploy apps with git push and containers. Developers can deploy any app to any cluster in seconds.

AppScale and Flynn can be categorized as "Platform as a Service" tools.

Some of the features offered by AppScale are:

• UI & Dashboard
• Manage Apps, Machines, and Logs
• Automated Data Persistence

On the other hand, Flynn provides the following key features:

• Flynn goes beyond 12 factor apps. Run any Linux process written in any language or framework, even stateful apps on your own servers or any public cloud.
• Scaling or adding a new cluster is simple: just add more nodes. Everything is containerized, Flynn takes care of distributing work across the cluster.
• Flynn is 100% free and open source. Flynn works great out of the box, and since Flynn is modular and API-driven it's easy to modify and swap components to suit your needs.

AppScale and Flynn are both open source tools. It seems that Flynn with 7.24K GitHub stars and 534 forks on GitHub has more adoption than AppScale with 2.39K GitHub stars and 273 GitHub forks.