To my understanding, JSTransform is essentially a toolchain for writing transpilers, while Sweet.js is a macro system for JavaScript. They both fall into the "t

To my understanding, JSTransform is essentially a toolchain for writing transpilers, while Sweet.js is a macro system for JavaScript. They both fall into the "things that allow you to output JavaScript from a file with user-defined constructs," but JSTransform is more "tool"-oriented while Sweet.js is essentially a language that's a superset of JavaScript with Scheme-ish macros.