The order management system (OMS) software market is well established, but the acceleration of omnichannel commerce — amplified by 2020’s unexpected requirements — has breathed new life into the category. The resulting retail emergency challenged enterprises’ strategies and shook up the vendor landscape. Over the past 20 months, brands and retailers lauded OMS as the hero of digital business. In our 2021 evaluation of seven top OMS vendors, we spoke with 20 customer references about their experiences implementing and managing an OMS. This report highlights what matters most to modern OMS users.