fly.io/ruby-dispatch/mrsk-vs-flyio/

MRSK

It sits on top of basic Docker, and harvests all the benefits you get from isolated containers with a sliver of the complexity associated with most other solutions. Instead of sending the deployment pipeline off to servers in the cloud, it runs entirely on your own machine. Just like Capistrano did.

Fly.io

We transmogrify Docker containers into lightweight micro-VMs and run them on our own hardware in racks around the world, so your apps can run close to your users