Knock has publicly launched its product notifications infrastructure for developers, designed to simplify the integration and management of notifications within products without the need for in-house systems. After a successful beta phase with select customers, the solution is now available for broader use, offering APIs and a dashboard that facilitate the creation of effective notification systems. Knock addresses the complexities of notification delivery, such as managing frequency and channel appropriateness, which have evolved beyond just ensuring message delivery. Founded by former Frame.io employees, the company seeks to provide a robust, scalable solution with features like batching, user preference management, and real-time infrastructure. Knock aims to enhance customer engagement by allowing teams to efficiently implement notification systems, and has secured $2.7 million in funding to further develop its offerings. The platform supports diverse notification needs, including in-app feeds and integration with third-party apps like Slack, while also providing isolated environments and comprehensive observability for developers.