Here are the top 10 B2B e-commerce platforms today: Adobe Commerce (Magento), Shopify Plus, BigCommerce B2B Edition, Salesforce Commerce Cloud, SAP Commerce Cloud, Oracle Commerce, OroCommerce, VTEX, commercetools, and Sana Commerce. In comparison, platforms like Adobe Commerce and SAP Commerce are best for large enterprises due to deep customization, strong ERP/CRM integration, complex pricing, and high scalability but require more technical setup and can be expensive, while Shopify Plus and BigCommerce are SaaS-based, easier to use, faster to deploy, and better for SMBs to mid-market companies with good bulk ordering, company accounts, and moderate integration needs; Salesforce Commerce Cloud excels in CRM-driven personalization, commercetools is highly flexible API-first headless commerce for advanced enterprise scalability, and OroCommerce and Sana Commerce are B2B-focused platforms with strong native features like custom pricing, RFQ, and ERP-centric workflows. Overall, SaaS platforms are simpler and faster but less customizable, while on-premise/hybrid enterprise platforms offer maximum control, deeper ERP/CRM integration, and scalability for complex global B2B operations.