There are many alternatives to Babel for Node.JS if you are looking for a replacement. The best Node.JS alternative is Typescript, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 10 alternatives to Babel and three of them are available for Node.JS so hopefully you can find a suitable replacement. Other interesting Node.JS alternatives to Babel are Bublé (Free, Open Source) and Sucrase (Free, Open Source).
Sucrase is an alternative to Babel that allows super-fast development builds. Instead of compiling a large range of JS features to be able to work in Internet Explorer, Sucrase assumes that you're developing with a recent browser or recent Node.