Knock

About Knock

Knock is a unified notification infrastructure platform that lets you send messages across email, SMS, push, in-app, Slack, Microsoft Teams, and more from a single API. Design multi-step notification workflows visually with a drag-and-drop builder, manage user preferences with built-in preference centers and send windows, and unify customer data from warehouses, CDPs, and webhooks. Knock handles the complexity of cross-channel orchestration, intelligent batching, throttling, and delivery tracking so your engineering team can focus on building product instead of maintaining notification plumbing. The platform includes a drop-in React component for in-app notification feeds and toasts, real-time message delivery via WebSockets, and full observability into every notification sent. Knock supports Infrastructure as Code through its CLI, enabling version-controlled workflows that integrate with your existing CI/CD pipeline. Dynamic audience segmentationsegmentation lets you target the right users at the right time based on events, properties, and behaviors. Built for engineering and product teams at companies like Vercel, Webflow, and Clay who want reliable, scalable notification infrastructure without months of custom development.

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