Just to be clear, the list is not supposed to be exclusive -- there's a lot of companies using Haskell out there. :)

I just wanted to feature some of the biggest names and some of the cool use cases.

BTW, if you're interested in Haskell case studies, we have a series called Haskell in Production (https://serokell.io/blog/haskell-in-production) with interviews with Haskell projects that covers more ground.

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