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Knock

Customer engagement and messaging infrastructure for teams

Customer engagement and messaging infrastructure for teams

What is Knock?

Knock is a customer engagement platform designed to help teams build, edit, and ship product, marketing, and transactional notifications across multiple channels. It enables cross-channel delivery across email, SMS, push, chat, and in-app components, allowing non-engineering team members to manage messaging copy and targeting directly.

The platform integrates with data warehouses, CDPs, reverse ETL tools, and webhooks to trigger relevant workflows based on user attributes and real-time events. Built specifically for developer workflows, Knock includes version control, CI/CD integrations, CLI tools, built-in observability, and SDKs for all major programming languages.

Key features

  • Cross-channel delivery via email SMS and push
  • In-app messaging using custom UI components
  • Real-time data ingestion from CDPs and warehouses
  • Developer SDKs across major programming languages
  • CLI tools and AI code editor integrations
  • User preference centers and send window controls
  • Built-in notification observability and log streaming

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