ERP (Enterprise Resource Planning) systems are the backbone of most mid-market and enterprise businesses — integrating finance, supply chain, HR, manufacturing, sales, and operations into one unified system. Major ERPs include SAP, Oracle, Microsoft Dynamics, NetSuite, Sage Intacct, and Infor.
For customer portals, ERP integration is often the most critical technical requirement: the portal reads pricing, inventory, customer accounts, and order history from the ERP, and writes new orders, invoices, and customer updates back. Most B2B portal platforms (Coupa, SAP Customer Experience, NetSuite Customer Center, Pepperi, Sana Commerce) are designed around tight ERP integration.