Knock data sources

The platform provides a unified API for sending product, marketing, and transactional messages across email, SMS, push, chat, and in‑app channels. It connects to data sources such as Stripe, Clerk, and Supabase, allowing developers to trigger communications in response to events from those services. Messaging workflows can be defined and edited in a web dashboard, and the system supports AI‑assisted composition of content and routing logic.

It is aimed at product‑led teams and developers who need to integrate customer‑engagement flows directly into their applications. SDKs are available in multiple programming languages, enabling both backend services and front‑end agents to invoke the messaging engine. The service emphasizes reliability, offering high uptime and scalable delivery.

Distinctive aspects include the ability to orchestrate cross‑channel journeys with a single prompt, built‑in AI tooling for personalization, and the focus on event‑driven triggers from specific SaaS data sources. The offering is currently marked as experimental.