Build notification workflows that retain users
At the heart of Knock is our powerful notification engine. Build your notifications with primitives that make it easy to compose notification logic for your product, no matter how complex your use case.
Reach your customers, where they are
Send notifications to out-of-app channels such as email, push, SMS, and Slack, all with a single API call.
See channel integrations →
Smart routing rules and preferences
Knock's intelligent workflow engine automatically applies routing rules and user preferences for you, with no code to write on your side. Let us take care of handling if and when a customer should receive a notification, so you can focus on building your product.
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Composable functions to handle any notifications use-case
Use our workflow functions to perform common notification needs such as batching multiple notifications, sending based on user-device state, fetching data from external services, and more.
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Unparalleled visibility into your notifications
Every notification workflow run is captured and logged for you, so you can easily debug notifications for an individual customer. Get end-to-end visibility from API request to notification sent.
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Create your notification workflows
Use our powerful workflow builder to create cross-channel notification workflows with advanced features such as batching, wait to send, and if-then behavior.
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Connect your providers
Integrate with out-of-app channels such as email, push, SMS, and Slack, and power in-app channels via our in-app notifications API and pre-built components.
Supported providers →
Trigger your notifications
Use our SDKs to trigger your notification workflows from your backend code. Our advanced workflow engine routes your message to the right channel with the correct user preferences applied.
Read the docs →