If you’re looking for ERP systems that are completely open source and free (without any paid tiers or commercial licenses), here are some options:
1. ERPNext: Fully open source, ERPNext is one of the most robust and widely used free ERP systems. It covers a broad range of business functions, including accounting, HR, manufacturing, CRM, inventory, and more. It’s highly customizable and ideal for small to medium-sized businesses.
2. Dolibarr: This ERP and CRM software is completely free and open source, catering to SMEs. Dolibarr offers modules for invoicing, inventory management, accounting, and project management. It’s user-friendly and doesn’t have commercial versions, meaning everything is accessible in the free, open-source version.
3. Tryton: Tryton is a modular, 100% open-source ERP system, which is highly customizable and adaptable to various business types. It provides modules for accounting, sales, inventory, and other functions. Tryton’s emphasis on flexibility makes it ideal for companies with specific customization needs.
4. iDempiere: A fully free and open-source ERP and CRM system that is geared toward larger businesses and has modules for finance, HR, supply chain, manufacturing, and project management. It’s based on the ADempiere project and has a strong community.
5. Flectra: Though newer, Flectra is gaining traction as a free and open-source ERP and CRM. It covers functions like inventory, accounting, sales, and HR. Flectra is often compared to Odoo but remains fully open-source without premium tiers.
6. INOERP: INOERP is an open-source ERP software designed for manufacturing and distribution companies. It includes a variety of modules for inventory, planning, manufacturing, and supply chain management.
These options are fully open-source and free, allowing you to access the complete codebase and make modifications as needed without licensing fees or limitations.