Open-source CRMs are generally more customizable than most other CRMs. Because their source code is open, companies can modify features, workflows, and the user interface to suit their specific needs. You can add modules, integrate third-party tools, or even create custom functions. With other CRMs, customization is often limited to preset options or paid add-ons. Open source CRM gives you complete control over data, features, and integrations. They are ideal for businesses with unique processes or specific requirements, offering a level of flexibility that other CRMs typically cannot match.

https://webkul.com/blog/best-open-source-crm-software/