[master_crab]

Are any enterprises using OCaml other than Jane Street? I’m sure there are, but I haven’t heard of any.

[yawaramin]

https://ocaml.org/industrial-users/businesses

Many others that are not direct or heavily publicized like Jane Street eg:

https://github.com/FFTW/fftw3

https://github.com/oanda/oflux

[BrawnyBadger53]

Ahrefs, Bloomberg, Meta are the ones that come to mind