Oracle Commerce Cloud
it is a unified SaaS solution that puts control in the hands of commerce professionals to innovate quickly, with the ability to deliver connected, personalized experiences, and drive customer engagement, sales, and loyalty across channels.
Salesforce Commerce Cloud
formerly called Demandware, is a cloud-based service for unifying the way businesses engage with customers over any channel or device. ... The aim is to enable consumers and stores to provide seamless customer service and experience whether customers are online or in stores.
It is a open-source e-commerce platform written in PHP. It uses multiple other PHP frameworks such as Laminas and Symfony.