Knock is flexible notification and customer engagement infrastructure built API-first for developers. The platform consolidates multi-channel messaging across email, SMS, push, chat, and in-app channels into a single API eliminating the need to integrate separate providers for each channel. Advanced segmentation with dynamic attributes enables precise targeting without complex query building.
AI-native journey building allows teams to create messaging workflows from single prompts. In-app messaging with custom components enables rich notification experiences. Data unification across warehouses, CDPs, and webhooks ensures messaging decisions use complete customer context. Version control with rollbacks provides safety for production workflow changes. HIPAA and SOC2 compliance make it suitable for regulated industries.
Delivering hundreds of millions of messages monthly with 99.99% uptime Knock has proven reliability at scale. The CLI integrates with Cursor and Claude Code enabling developers to manage notification workflows alongside application code. For teams building products needing reliable multi-channel communication Knock provides infrastructure that would otherwise require significant custom engineering effort and ongoing maintenance.
