There's no definitive answer to this question since it depends on a number of factors, such as the size and needs of your business, your budget, and your preferences. However, some of the most popular enterprise ecommerce platforms include Magento, Shopify Plus, and BigCommerce Enterprise.
Here are some things to keep in mind when choosing an enterprise ecommerce platform:
Scalability: Can the platform accommodate your growing business?
Support: Does the platform offer 24/7 support?
Security: Is the platform secure and PCI compliant?
customization: Can the platform be customized to meet your unique business needs?
integrations: Can the platform integrate with your existing systems?
price: Is the platform affordable for your business?
To learn more about enterprise ecommerce platforms, check out this article: https://www.business2community.com/ecommerce/top-10-enterprise-ecommerce-platforms-01932616