Deis vs dotCloud: What are the differences?

Developers describe Deis as "Open Source PaaS that builds upon Docker and CoreOS to provide a lightweight PaaS with a Heroku-inspired workflow". Deis can deploy any application or service that can run inside a Docker container. In order to be scaled horizontally, applications must follow Heroku's 12-factor methodology and store state in external backing services. On the other hand, dotCloud is detailed as "Deploy, manage and scale any web app". Build your ideal application stack by combining powerful cloud services. Experiment for free, then go live and only pay for what you need. dotCloud enables developers and IT organizations to deploy, manage and scale their applications with unprecedented ease and flexibility by assembling and customizing powerful pre-configured stacks and services.

Deis and dotCloud can be categorized as "Platform as a Service" tools.

Some of the features offered by Deis are:

• Deis can deploy any language or framework using a Dockerfile
• If you don't have a Dockerfile, Deis includes Heroku buildpacks for Ruby, Python, Node.js, Java, Clojure, Scala, Play, PHP, Perl, Dart and Go.
• Deis can be deployed on any system that supports CoreOS including your workstation, as well as most public clouds, private clouds and bare metal.

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

• Develop faster- Don’t waste time with servers. Just select the services you need, combine them in a stack, and get back to writing code. It’s like playing lego!
• Don't worry about ops- We keep your app running 24/7 with built-in load-balancing, monitoring and failover. Scale in seconds to handle surges in traffic - and only pay for what you need.
• Not just for throw-away apps- Create maintainable, future-proof applications with a service-oriented architecture. Build custom services and network topologies. Need custom support, pricing or SLAs? We do that too.

Deis is an open source tool with 6.12K GitHub stars and 863 GitHub forks. Here's a link to Deis's open source repository on GitHub.