Guide

Best in-app notification centers in 2026

A developer-focused comparison of the best in-app notification centers in 2026. We cover build vs buy, then compare prebuilt UI components, real-time delivery, platform coverage, channel support, and pricing across Courier Inbox, Novu, MagicBell, Liveblocks, Braze, CleverTap, Airship, OneSignal, and Customer.io.

Top 10 push notification providers in 2026

Comparing Courier, Firebase Cloud Messaging, Apple Push Notification service, Amazon SNS, OneSignal, Expo, Airship, Braze, CleverTap, and Pushwoosh on platform reach, reliability, developer experience, and pricing, each checked against its own documentation.

Is texting patients a HIPAA violation?

The short answer: texting patients is fine until an unsecured text carries protected health information. This post draws the line with side-by-side SMS examples, covers the minimum-necessary rule and when a BAA is required, and shows the template pattern that makes it structurally impossible to leak PHI into a text.

watchOS 27 Notifications: What Changed and How to Adapt Your Product Sends

Apple's watchOS 27, announced at WWDC 2026, presents Apple Watch notifications based on relevance instead of arrival time and expands contextual Smart Stack widgets. Because watch notifications mirror iPhone push, your push strategy is your watch strategy. This guide covers what product and B2B notification teams should change: setting APNs interruption levels honestly, writing glanceable payloads, routing by urgency across push, email, SMS, and in-app inbox, using widgets for status content, and handling the split audience after watchOS 27 drops Series 8, Ultra 1, and SE 2.

Your Entire Lifecycle Marketing Department, Run from Claude Fable 5

With the rollout of Claude' Fable model, one thing is becoming increasingly clear. Marketing execution (especially the long-tail work), will be done in an AI editor. In Courier, connect your agent to the MCP server or CLI, install Courier Skills, and keep a small folder of markdown context files. From there, one person with a coding agent covers the work that used to require a lifecycle marketer, an email designer, a marketing ops hire, and an engineer: building journeys, shipping templates, auditing every notification, and debugging delivery without opening a dashboard.

Human-in-the-loop for AI payment agents: building approval notifications that work

AI agents need human approval before taking consequential actions: financial commitments, irreversible changes, decisions that affect other people. This post covers how to design those checkpoints and build the notification infrastructure: multi-channel delivery, live context, escalation, and a back-and-forth question loop between reviewers and the agent.

AI Tools for Product Managers: The Modern PM Stack

The modern PM stack runs on AI at every step: Cursor and Claude Code for build, Pencil and Claude Design for prototyping, Courier for notifications and agent communication, Segment for routing product events and engagement data, PostHog for analytics and LLM evals, and a knowledge system like Notion for shared memory across humans and agents.

Throttling notifications across product, transactional, and marketing streams

A notification throttle that drops every event over a limit works fine for marketing nurtures and fails for product notifications, because product events carry context users actually need. The fix is pairing throttling with auto-batch: overflow events feed a batch node that rolls them up into a single digest, optionally rewritten by an AI node that prioritizes and summarizes the contents. This guide covers per-stream throttle setups for transactional, product, and marketing flows, and how the Courier Journeys AI node and fetch-data node fit into the pattern.

How to Send Notifications from an AI Agent with Courier's MCP Server

AI agents handle support tickets, monitor pipelines, run onboarding flows, and sync CRM data. When they do, someone needs to know what happened. Courier's MCP server gives agents direct access to the full notification API: send across email, push, SMS, Slack, and in-app. Check user preferences before sending. Trigger batch and digest Journeys so high-volume agents don't spam users. This guide covers MCP server setup, CLI tooling, Courier Skills for your IDE, and five real-world patterns with starter prompts.