Over the past few weeks, I've had a great time working with the folks at Heroku to build out a sample Action Cable + Rails 5 chatting application.
Action Cable, Rails 5's full-stack WebSockets implementation, is easy to work with and integrates beautifully with existing Rails design patterns.
You can check out my post about it on the Heroku blog–– Real-Time Rails: Implementing WebSockets in Rails 5 with Action Cable.