EveryMatrix Backend Software

Hi Guys

I need your advise on a casino backend.

I am in the process of considering my options and have boiled it down to

NYX
EVERYMATRIX
OPENBET

Does anyone have any experiences with any of the above they all seem to be similar though in terms of clients NYX and OPENBET seem to have much more reputable clients than Everymatrix

Does anyone know anything about everymatrix how efficient their backend end if its same standard as nyx or openbet and who the guys behind it are

Thanks
Sarah