Facebook uses Haskell in their anti-spam system [0] and for smart remote data fetching [1]. [0] https://code.facebook.com/posts/745068642270222/fighting-spam-w

Facebook uses Haskell in their anti-spam system [0] and for smart remote data fetching [1]. [0] https://code.facebook.com/posts/745068642270222/fighting-spam-with-haskell/ https://code.facebook.com/posts/745068642270222/fighting-spa... [1] https://code.facebook.com/posts/302060973291128/open-sourcing-haxl-a-library-for-haskell/ https://code.facebook.com/posts/302060973291128/open-sourcin...