ERPNext is an alternative ERP to SAP, Sage, Oracle, Mircosoft dynamics and etc.
ERPNEXT is a lot more economical as it is open source and customizing it to your company's needs.
I am an ERPNEXT Implementation Consultant. My team can give you A to Z solutions to your needs. My team has the experience and technical knowledge in ERP Implementation in other to maintain a self-hosted server, and upgrades, carry out customization, and conduct training on each module and domain of ERPNEXT.