What is the difference between a 4PL and a logistics control tower?

The terms describe the same model under different labels. A control tower is the operational term for the centralised management and visibility function a 4PL provides — real-time monitoring of all carriers and 3PLs in the network, exception handling when shipments deviate from plan, KPI reporting, and strategic network adjustment based on performance data. Some 4PL providers use the control tower label to emphasise the technology and visibility layer of their service. The structural model is the same: one provider manages multiple 3PLs on behalf of the shipper, with full strategic and operational accountability for all logistics performance.