The system uses location information from mobile phone operators Orange, T-Mobile, Vodafone and O2, placed on maps using a website, with no set-up cost or extra equipment.
Erik Jansen, managing director of FleetOnline.net creator Teydo, said: 'Up to now, electronic vehicle tracking in industries such as transport has been achieved using global positioning technology, but this has required technical set-up and special terminals costing several thousand pounds per vehicle.'
The company said many businesses were not big enough to justify new computer systems and software.
FleetOnline.net uses location information available through most mobile handsets, and the information can be placed on a map accessed by fleet operators. For more information, visit www.fleetonline.net.