Maybe for driving technology specifically the space is small. But for supply chain management there are a number of players: SAP, Oracle, and Kinaxis to name three. There are more than a dozen though.
Despite best efforts, even among the largest lines (Maersk + others via DCSA), EDI still reigns supreme in this space. Nothing inherently wrong with EDI itself but there are plenty problems with access. Port & terminal level visibility are in an even worse place.