Zero-sum customer Retention is a competitive strategy in which a business gains customers by taking them from its competitors rather than growing the overall market. This approach focuses on identifying dissatisfied customers in rival companies and targeting them with superior service, personalized offers, or loyalty incentives. CRM systems enable businesses to analyze competitor churn patterns, implement proactive retention measures, and execute customer win-back campaigns. By positioning their brand as the better alternative, companies can increase market share while minimizing churn within their existing customer base.