Courier
The customer messaging platform for humans and AI agents.
Courier is a customer messaging platform that centralizes notification infrastructure for product teams. It handles multi-channel delivery, provider failover, retries, throttling, and observability so teams can focus on their product rather than maintaining messaging plumbing.
Core capabilities include Notification Infrastructure (APIs, SDKs, templates, routing, user preferences, unified delivery tracking), Customer Journeys for multi-step branching workflows, Design Studio for no-code content creation with multi-channel preview, an embeddable in-app Inbox notification center for web and mobile, and an AI Agent step that runs frontier models to score users, generate content, and enrich profiles. Integrations span email, SMS, push, chat, Slack, Microsoft Teams, customer data platforms, and observability tools through a unified provider layer with intelligent failover.
Courier is aimed at developers, product, and growth teams. Backend SDKs cover Node.js, Python, Ruby, Go, Java, PHP, and .NET, with in-app Inbox SDKs for web and mobile. It offers a free plan to start sending, with a pay-as-you-scale pricing model.
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