Hi I'm Michael, co-founder of ChatWisely. We used Haskell to build this, and would love to get into the details about how that is working out for us. Spoiler: it's awesome.

Front end - https://reflex-frp.org/ Webserver Product - https://www.servant.dev/ Webserver Landing Page - https://www.yesodweb.com/ Database - https://www.postgresql.org/

Let's talk tech!