CRM Developers customize existing CRM offerings or build new features from scratch. Businesses are then not restricted to the out-of-the-box CRM products and features. Rather, they can make the application their own by molding it into what they need. A CRM is like a base variant car. CRM Developers customize CRMs by doing the equivalent of upgrading the engine, changing the rims and tires, adding a new sound system, and repainting the car.