Knock – Notification Infrastructure for Developers

In plain words

Knock is a notification infrastructure platform for developers that provides APIs and tools to build complex notification systems without managing infrastructure in-house. It enables developers to quickly deploy real-time in-app feeds and integrations with services like Slack, Discord, and Teams. The platform is designed to reduce development time and complexity for companies that need to scale notification systems at their product.

written from the facts on this page · September 2026

From the sources

In the maker’s words, at launch

Hey HN! I’m Chris – one of the co-founders at Knock (https://knock.app). Knock is notifications infrastructure for developers. We provide a set of flexible API primitives you can use to power complex notification systems, without having to roll your own notifications infrastructure in-house. In short: we…

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  Knock2022 · knock.app · ▲342

  Notification infrastructure for developers

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  Knock CLI2023 · knock.app · ▲104

  Bring your notification infrastructure to your fingertips

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  Knock agent for SlackJun 2026 · knock.app · ▲112

  Build, manage, and ship customer messaging from Slack

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  Slack2013 · slack.com · ▲2,714

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  SuprSend2022 · suprsend.com · ▲406

  We as developers, build and maintain many services in code, one of them being notification service. In the last 5-7 years, API-to-user communications have exploded across SMS, email, chat apps, mobile, and web push. As a consequence, notification service handling them has become quite complex. Developers spend time building integrations with multiple providers, create templates for each channel, managing scheduling and routing based on preferences, maintaining queues to deliver notifications on time while managing scale. Besides, product teams have poor visibility on notifications as…

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