ACI Worldwide acquired Pay.On for $200 million in cash and stock on November 4, 2015. Pay.On was a pioneer in sales support for online merchants in Europe. It provides a gateway that payment service providers (PSPs) and acquirers license and use on a white label basis. The gateway features more than 300 alternative payment methods and links to card acquirers operating in more than 160 countries. It does not acquire any transactions. Pay.On gives ACI a card-not-present service including in-app payments via mobile SDKs, one-click checkout, and recurring billing to fill out its suite of card-p...