The top B2B e-commerce platforms today include Shopify Plus, BigCommerce, Adobe Commerce (Magento), Salesforce Commerce Cloud, SAP Commerce Cloud, OroCommerce, commercetools, Oracle NetSuite Commerce, Sana Commerce, and Spryker. Shopify Plus and BigCommerce are popular for fast deployment, scalability, and ease of use, making them ideal for SMBs and growing wholesalers. Adobe Commerce and SAP Commerce Cloud are better suited for enterprise organizations needing deep customization, ERP integration, complex pricing, and multi-user account management. OroCommerce is highly regarded for B2B-first features like RFQs, quote management, and account hierarchies. Commercetools and Spryker lead in API-first and headless commerce flexibility, while Salesforce and NetSuite excel in CRM and ERP integration. Overall, startups often prefer Shopify Plus or BigCommerce for affordability and speed, mid-sized businesses benefit from OroCommerce or Sana Commerce, and large enterprises usually choose Adobe Commerce, Salesforce, or SAP Commerce Cloud for advanced scalability, governance, analytics, and global operations.