Causal, a dynamic financial modeling platform, replaced its legacy email-based notification system with Knock to enhance notification capabilities and improve user engagement. This transition allowed Causal to move beyond email and in-app notifications to include Slack, leveraging Knock’s multi-channel support to reach users more effectively. Knock’s workflow builder enabled Causal to develop complex notification logic without extensive custom coding, significantly boosting developer productivity and allowing the team to focus on core product features. The improved notification system addressed the bottlenecks created by the previous setup, facilitating timely updates and engagement through various channels. Causal also provided users with notification preferences, allowing personalized communication, which further improved user experience. By integrating Knock, Causal enhanced both the developer experience and customer engagement, effectively reaching users where they are most likely to pay attention and transforming the notification system into a scalable, efficient tool.