Bitrix24 and Odoo are two open-source ERP systems that were compared. Bitrix24 provides a free collaboration platform with communication tools, task and project management, CRM functionality, and a contact center. It has pricing plans from free to professional. Odoo is a comprehensive ERP software with over 30 integrated business modules including CRM, e-commerce, accounting, and manufacturing. It has over 16,000 third-party apps and pricing from $2,700 to $18,750 depending on implementation needs. Both systems were found to have pros like features and customization but also cons like bugs, documentation and costs.