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Courier vs Knock

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Courier compared with Knock
DetailCourierKnock
What it doesThe messaging platform for humans and AI agents Customer engagement infrastructure for product, marketing, and transactional messaging
StageNot given Not given
FoundedNot given Not given
Based inNot given Not given
Pricing modelfreemium Not given
PricingDeveloper plan free with 10,000 sends per month; Business plan at $0.005 per send; Enterprise plan with custom pricing and volume discounts. No per-seat or channel add-on fees. Not given
Key features
  • Multi-channel delivery (email, SMS, push, chat, in-app)
  • In-app notification center with real-time sync
  • Design Studio for visual template creation
  • Journey Builder for multi-step orchestration
  • AI Agent integration with frontier models
  • Event-driven messaging from user behavior
  • Intelligent routing with channel fallbacks
  • Delivery analytics and observability
  • SDKs, REST API, and MCP server support
  • Cross-channel message routing
  • Batch and delay notifications
  • AI-powered message generation
  • In-app messaging with custom components
  • AI agents for messaging tasks
  • Data unification and activation
  • Version control and environments
  • Observability and analytics
What makes it different
  • Unified platform eliminates need for multiple messaging tools
  • No-code design studio enables non-technical teams to ship notifications
  • Native AI Agent integration for personalization and orchestration
  • Real-time in-app inbox with drop-in components
  • Simple usage-based pricing with no hidden charges
  • AI-native messaging agents to build campaigns in minutes instead of days
  • 99.99% uptime SLA for production reliability
  • Developer-first with SDKs in all major languages and CLI integration
  • No-code workflow builder enabling non-technical teams
  • Unified platform for product, marketing, and transactional messaging
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)68 no change since last check71 no change since last check
Trust Flow (Majestic)5036
Citation Flow (Majestic)4748
Referring domains (Majestic)15291057

3 details filled in for both companies.

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