Leading customer success in API-first businesses, which focus on self-serve models, differs from traditional enterprise software by emphasizing API integration over the number of active users or licenses. While traditional enterprises use metrics like active seats to gauge growth or churn, API platforms focus on API call volume and integration quality. Customer success in API-first businesses involves managing both the web and API experiences, using key performance indicators to assess onboarding and long-term value. Tools like Moesif help monitor and enhance customer success by providing dashboards and alerts that track API usage and detect potential issues. Moesif allows companies to create both overview and per-account dashboards, enabling them to switch between accounts using filter overrides and receive alerts on significant API usage changes, thereby allowing proactive customer engagement. This approach ensures that API businesses can maintain customer satisfaction and address issues before they lead to churn.