Open Source Enterprise Resource Planning Systems
Open source ERP software you can self-host. Compare SAP, Oracle NetSuite, and Odoo alternatives by modules, accounting, inventory, and license. Updated Sept 2026.
Odoo
Odoo is an open-source, modular business suite licensed under LGPLv3, and a self-hosted alternative to SAP, NetSuite, and Salesforce. Its Community Edition covers CRM, accounting, inventory, manufacturing, HR, and e-commerce as installable apps that share one database, so businesses can start with one module and add more as they grow.
ERPNext
ERPNext is an open-source enterprise resource planning suite, and a self-hosted alternative to SAP, Oracle NetSuite, and Microsoft Dynamics. Built on the Frappe framework, it covers accounting, inventory, manufacturing, sales and purchasing, projects, HR, and CRM in one data model, with every form, report, and workflow customizable without forking. It fits small businesses through mid-market operations.