The best free alternative to Microsoft Dynamics 365 is ERPNext, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Microsoft Dynamics 365 and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Microsoft Dynamics 365 are Dolibarr (Free, Open Source), Bitrix24 (Freemium), EspoCRM (Freemium, Open Source) and Mautic (Freemium, Open Source).
ERPNext is a free and open-source integrated Enterprise Resource Planning (ERP) software developed by Frappé Technologies Pvt. Ltd. and is built on MariaDB database system using a Python based server-side framework.
Mautic is marketing automation software (email, social, & more). Install on your own website or create a free hosted account. The simple 3-step setup process takes less than 5 minutes and you'll be ready to reclaim control of your marketing.
Corteza CRM is an advanced Free and Open Source Customer Relationship Management platform. Feature rich, a cloud scalable architecture and entirely modular, Corteza CRM allows any organisation to create the CRM environment tailored to their context.
Crust CRM is a 100% free and open-source CRM. It's fully featured and includes rich dashboards, automation rules (workflows), collaborative team messaging and much more. You can customise your CRM with the included low-code development platform.
SuiteCRM provides an enterprise-grade Customer Relationship Management (CRM) application to a global community of users and software developers. It is a robust and credible alternative to Salesforce, Microsoft and the major CRM vendors.
Free and open source human resource management software (HRMS / HRIS) with rich features and easy to use interface. It covers personnel information management, employee self service, leave, time & attendance, benefits, and recruitment.
Tryton is a three-tiers high-level general purpose application platform under the license GPL-3 written in Python and uses PostgreSQL as database engine. It's the core base of a business solution providing modularity, scalability and security.