Atomic CRM is described as 'Open-source framework for personalized CRMs. Out of the box, it provides everything you need to manage contacts, notes, tasks, and deals – the essential features of any CRM. Plus, it comes with inbound email support, single sign-on (Google, Microsoft, Auth0, and' and is a CRM system in the office & productivity category. There are more than 10 alternatives to Atomic CRM for a variety of platforms, including Web-based, SaaS, Android, iPhone and Self-Hosted apps. The best Atomic CRM alternative is Odoo, which is both free and Open Source. Other great apps like Atomic CRM are ERPNext, HubSpot, Adobe Commerce and EspoCRM .