HubSpot, a web marketing startup is under pressure from VCs to rapidly acquire new customers and to maintain a low level of customer churn. In the case, students explore the drivers of customer churn and uncover opportunities to increase customer retention across the customer selection, selling, and training processes. Students assess a metric, CHI (Customer Happiness Index) which HubSpot uses to predict which customers will churn, and suggest alternatives to improve the firm's predictions. Students develop programs to reduce churn post-hoc and then reengineer the company's marketing, selling, and customer relationship management processes to manage churn proactively through market segmentation and targeting, product design, and customer interactions.