Courier is a notification management platform that aims to simplify the process of managing multiple notification providers by introducing universal statuses. These statuses are mapped into clear and universal definitions, making it easy for users to understand and manage their notifications across different providers. Courier provides a single source of truth for tracking messages, allowing users to easily drill down into provider-specific details while maintaining consistency in their view. The platform supports linear status transitions, ensuring that the next status is always predictable. Courier tracks engagement metrics such as email opens and click-through rates, providing data-driven insights for data-driven email notifications. Users can access their statuses through the Event Logs, which offer a column view of statuses with filtering capabilities. Additionally, Courier provides REST API endpoints for accessing data at scale. The platform continues to evolve with updates on logging infrastructure, including support for webhooks and advanced analytics.