MeteorTech is run by Dr. Eggman as a front for another attempt at creating the Eggman Empire. Although it is a security manufacturing company, it has only been shown to produce robots such as SCR-GP and SCR-HD. MeteorTech's headquarters, Crimson Tower, is the worldwide communication center for the company, whose mother computer was formerly powered by the Ark of the Cosmos. This place happens to be the location of said artifact.
MeteorTech was a largely settled company whose security robots were conveniently positioned throughout the landmass shown in Sonic Riders: Zero Gravity. It was of primary interest to Sonic and his friends, who immediately recognized a connection between the company, the SCR-HD and SCR-GP robots in a global rampage and the Arks of the Cosmos. However, the connection to Eggman remained unknown until the Doctor himself revealed this when he was discovered working at the mother computer.
Places of interest
The following areas bear a presence of Meteor Tech.
During the cutscenes, the company is referred to as "MeteoTech", while during the races and level select, it is referred to as "MeteorTech".
The news report in the opening cinematic of the game refers to MeteorTech as a "trusted, leading security company". This is ironic, given that Dr. Eggman, a notably untrustworthy person, is the company's founder and owner, though it is possible that his involvement is hidden from the public.
It also implies that MeteorTech has been around for a long time before Sonic Riders: Zero Gravity, possibly even during Eggman's other schemes.