As a very superficial comparison, PureScript is a lot more similar to Haskell than to Elm. All three are great languages, but of the three Elm is definitely the

As a very superficial comparison, PureScript is a lot more similar to Haskell than to Elm. All three are great languages, but of the three Elm is definitely the simplest and IMHO most beginner-friendly. It's also the least flexible and general. In many ways, PureScript is actually a better version of Haskell (e.g., with extensible records). But it's currently very focused on front-end development, and it's missing amazing Haskell features like STM. So outside of front-end stuff it's not nearly as practical to use as Haskell.