Play, Rails, Ratpack, and Immutant. These frameworks use alternative JVM languages -- Scala, JRuby, Groovy and Clojure -- to reimagine how we build web applications. But are they mature enough for production? Can they scale? Will they solve your problems or create new ones? In this talk, you’ll learn how JVM developers are using these frameworks in the real world. We’ll compare the benefits and drawbacks of each, and look at what unique features they provide. We’ll begin with a brief introduction to each framework. You’ll learn how to get started, build content, and deploy to the cloud. Then we’ll compare caching, database connectivity, templating, asynchronous request processing, language paradigms, build tools, web sockets and even documentation. After this talk, you’ll be able to decide which framework is best for your next project.