Customer retention is a critical issue for startups, as a high churn rate can undermine customer acquisition efforts. Addressing this challenge involves a multi-step approach, beginning with the identification of churned customers, which requires analyzing user data to discern patterns and potential causes of attrition. Personalized and broad reengagement strategies are recommended, such as tailored messages to specific users, email drip campaigns, feature announcements, and webinars. These tactics aim to either assist users in overcoming product hurdles or rekindle their interest. Experimentation is key, as different techniques may work for various user segments. Preventative measures, including ensuring that new customers align with the product's target profile, optimizing onboarding processes, auditing the user journey, and maintaining a responsive support system, are also emphasized to mitigate future churn. Although improving retention is a gradual process, employing these strategies can lead to better outcomes over time.