The specialist fleet division of Camden Motors will initially provide cars for easyCar's Earls Court site, followed by other locations.
The Vauxhall deal does not replace easyCar's existing arrangement with DaimlerChrysler for Mercedes-Benz A-class rental cars, but aims to offer a cost-effective alternative.
Camden Motors corporate sales director Jeff Peyton-Bruhl said: 'We have become one of the major specialists in supplying the daily rental industry and can offer a highly cost-effective solution with fast turnaround times and solid processes.
'We now supply more than 10 major rental companies and have the infrastructure to handle massive volumes on a consistent basis.'
EasyCar fleet director Sean Hewitt added that he was convinced the Corsa would be successful on the company's fleet and would aid the growth of the easyCar brand and its network.