founded in 1985 by transportation company Roadway Services Inc., later renamed Caliber System. FedEx bought Caliber in 1998 to complement its existing FedEx Express business and rebranded Caliber's RPS package delivery service FedEx Ground in 2000.

FedEx Ground provides US and Canada domestic services as well as international services between the two, branded FedEx International Ground. Its services are cheaper than the time-definite services offered by FedEx