Pax had much better APIs for payment integration and was much more friendly to developers than Verifone, Ingenico and other merchant processing hardware manufac

Pax had much better APIs for payment integration and was much more friendly to developers than Verifone, Ingenico and other merchant processing hardware manufacturers. They were the equivalent of Ubiquiti in the pinpad space, when they entered the US market small and medium businesses had little choice besides them (or a much more expensive solution like Square where you do not get to choose your payment processor and pay dearly in fees) if they wanted to have a pinpad that showed custom promotions as a wallpaper, asked for email/phone #, stored cards for recurring payments, could change processors with a hands off remote key injection. For Point of Sale developers you either get to integrate with a godawful middleware like Datacap or do a direct integration with Ingenico or Verifone and a single payment processor, which creates significant vendor lockin. Your only alternatives were Pax and later Dejavoo offering simple APIs for semi-integrated payments.