The Courier Blog
Give your AI agents access to your notification infrastructure with the Courier CLI
The rebuilt Courier CLI lets AI agents send notifications, debug delivery issues, and manage users, lists, and tenants across every channel. If your agent has shell access, it has access to Courier.
Introducing Design Studio: a new way to craft customer messages
Introducing Design Studio, Courier’s new multi-channel message builder. Create notifications for email, SMS, push, inbox, Slack, and Teams in one editor with drag-and-drop blocks, HTML support, previews, test sends, and version history.
EU Data Residency for Notifications: What Engineering Teams Need to Know
Courier supports EU data residency through a dedicated datacenter in AWS EU-West-1 (Ireland), with full API feature parity, same-workspace dual-region access, built-in GDPR deletion endpoints, and localization support for multilingual notifications. Engineering teams can switch to EU hosting by changing a single base URL with no workspace migration or downtime required.
Notification Observability with OpenTelemetry & Courier (plus Grafana Support)
Courier now exports notification logs and metrics over OpenTelemetry, so teams can monitor delivery, failures, and automation health in Grafana, Datadog, and other observability platforms alongside the rest of their stack.
Customer Engagement Platforms Are Splintered. Message Orchestration Is the Fix
Customer engagement platforms are splintered. Some are built for campaigns, others for support automation, and others treat messaging as a transactional delivery problem. The result is collisions, blind spots, and message fatigue. The highest-leverage fix is solving the lifecycle-to-product and transactional vector with a message orchestration layer: one system that routes, suppresses, prioritizes, and observes messages across channels. Think air traffic control for user communications.
Expo Push Notifications: The Complete Implementation Guide (SDK 52+)
Expo push notifications are alerts sent from a server to a user's phone, even when the app isn't open. To set them up, install the expo-notifications library, ask the user for permission, and get a unique push token for their device. Your server sends a message to Expo's push service with that token, and Expo delivers it through Apple or Google. Push notifications only work on real phones, not simulators. Local notifications are different — they're scheduled by the app itself for things like reminders. You can also route Expo push through services like Courier to add email, SMS, and Slack fallbacks.
Best Email API Providers for Developers in 2026: SendGrid vs Postmark vs Mailgun vs SES vs Resend
Your email provider sticks with you longer than most technical decisions. Courier handles notification infrastructure for thousands of teams, so we went deep on the six email providers that show up most: SendGrid, Postmark, Mailgun, Amazon SES, Resend, and SMTP. This guide covers real API primitives, actual code from each provider's docs, Courier integration examples with provider overrides, and an honest read on where each developer experience holds up and where it breaks down. We also asked Claude to review every API and tell us which one it would wire up first. The answer surprised us.
I Built an AI Board Member in Cursor. Here's How.
Every month I send a board update—and every month I wish someone would tell me what’s wrong before it goes out. Investors are busy, feedback comes late, and most people soften the punch. So I built an AI board member using Cursor Rules: three markdown files, a basic project layout, and no plugins. Drop in your board deck, get an immediate review, and walk into the meeting with fewer surprises.
Top 8 Customer Engagement Platforms for Product-Led SaaS in 2026
Comparing Courier, Iterable, OneSignal, Braze, Customer.io, Knock, Novu, and SuprSend across orchestration, developer experience, and infrastructure primitives for product-led SaaS.