Knock Sources is a new feature that allows integration of customer data platforms (CDPs) like Segment and reverse ETL platforms like Hightouch with Knock, enabling seamless notification workflows without the need for direct API calls. This innovation caters to engineers, product managers, and marketers by simplifying the creation and management of notification workflows, using existing data flowing through event instrumentation tools. Knock Sources is designed to be flexible, allowing users to map event properties to Knock workflow parameters, thereby maintaining the integrity of existing data models and avoiding the need for new event configurations. It supports multiple actions for a single event, providing better visibility and debugging capabilities within the notification system. This development is part of Knock's mission to equip teams with tools for creating delightful notification experiences, and future updates will include additional source integrations and non-real-time notification capabilities.