Knock
Agentic customer engagement infrastructure for lifecycle and transactional messaging.
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About
Knock is a messaging infrastructure that enables developers to ship lifecycle and transactional messages across email, in-app, push, SMS, and chat channels. It features an AI agent layer that allows users to build workflows using natural language prompts, automatically handling triggers, audience segmentation, and multi-channel delivery. The platform integrates with existing data warehouses and CRM systems to provide real-time user context for personalized messaging flows.
Key Features
- AI-powered workflow builder using natural language prompts
- Multi-channel messaging support (email, in-app, push, SMS, chat)
- Integration with major AI agents (Claude, ChatGPT, Grok, etc.) via MCP and CLI
- Real-time CRM and warehouse data sync for personalization
- Developer-focused API and SDK
What Makes It Different
Combines a low-code/no-code prompt-based interface with a robust developer API, allowing both non-technical users and engineers to build complex, cross-channel messaging automations without managing separate tools for each channel.
Pricing
See website for pricing
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