JRuby vs Kotlin: What are the differences?
What is JRuby? A high performance, stable, fully threaded Java implementation of the Ruby programming language. JRuby is the effort to recreate the Ruby (http://www.ruby-lang.org) interpreter in Java. The Java version is tightly integrated with Java to allow both to script any Java class and to embed the interpreter into any Java application. See the docs directory for more information.
What is Kotlin? Statically typed Programming Language targeting JVM and JavaScript. Kotlin is a statically typed programming language for the JVM, Android and the browser, 100% interoperable with Java.
JRuby and Kotlin can be categorized as "Languages" tools.
"Java" is the top reason why over 7 developers like JRuby, while over 28 developers mention "Interoperable with Java" as the leading cause for choosing Kotlin.
JRuby and Kotlin are both open source tools. Kotlin with 28.3K GitHub stars and 3.28K forks on GitHub appears to be more popular than JRuby with 3.32K GitHub stars and 830 GitHub forks.
According to the StackShare community, Kotlin has a broader approval, being mentioned in 268 company stacks & 208 developers stacks; compared to JRuby, which is listed in 13 company stacks and 4 developer stacks.