GraalVM is the first comprehensive multilingual runtime, with a completely language-agnostic architecture and providing competitive (and usually better) performance than runtimes optimized for a single language and with zero-cost interop . We have demonstrated complete language fidelity across a wide variety of languages with many diverse & unusual features such as R, Ruby, and SmallTalk as well as popular languages like JavaScript, Python, and the JVM language family (Java, Scala & Kotlin). It is also designed to be embedded in other runtimes like databases or edge computing servers, or in dedicated devices with virtualization at the language runtime level.