GraalVM is currently based on Java 8, which was released five-and-a-half years ago. However, GraalVM 19.3, due in October 2019, will be based on Java 11, which arrived in September 2018. By moving to Java 11, which is a long-term support release of Java, GraalVM will enable users to take advantage of the Java module system for applications (introduced in Java 9) and garbage collection optimizations (introduced in Java 11). Another improvement eyed for GraalVM is an ARM64 back-end, which will also depend on Java 11.
GraalVM is used by organizations such as Twitter. It is available in an open source community edition and in a closed source enterprise edition, from Oracle.
Where to download GraalVM
You can download GraalVM from graalvm.org.