ProDemand is the premier online solution for automotive repair information, vehicle maintenance, diagnostic data, and labor estimating. About Mitchell 1 We started over 100 years ago with technical auto repair manuals and branched out to offer integrated software and services to the motor vehicle industry, including repair information, shop management and marketing. About Mitchell 1 We started over 100 years ago with technical auto repair manuals and branched out to offer integrated software and services to the motor vehicle industry, including repair information, shop management and marketing. About Mitchell 1 We started over 100 years ago with technical auto repair manuals and branched out to offer integrated software and services to the motor vehicle industry, including repair information, shop management and marketing. ProDemand is an online solution for automotive repair information, vehicle maintenance, diagnostic data, and labor estimating.