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By Mike Miller
In 2025, developers building cross-platform mobile apps face three main contenders: ByteDance's Lynx, Meta's React Native, and Google's Flutter. Each framework offers a different approach to the same challenge: how to build high-quality apps that work across platforms while keeping development efficient.
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By Thomas Schiavone
Building a great SaaS product isn’t just about features—it’s about keeping users engaged. You might spend months developing an amazing tool, but if users sign up, explore a few features, and then disappear, all that effort is wasted. Often, it’s not that they dislike your product; they simply forget about it or never realize its full value. That’s where multichannel notifications come in.
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By Thomas Schiavone
Good observability helps you understand what’s happening, but our previous logs made it hard to see the full picture. Debugging often meant searching, filtering, and manually piecing together trends. Spotting a spike in failures or a drop in message volume shouldn’t take that much effort. The new logs histogram makes this easier. Instead of scanning rows of data, you get a real-time visual overview of message activity.
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By Thomas Schiavone
Amazon Simple Email Service (Amazon SES) is widely used for sending emails at scale, but traditional authentication with IAM User credentials can be risky and cumbersome. Now, Courier supports IAM Role authentication for Amazon SES, offering a new, more secure way to authenticate without long-lived access keys. This method reduces the risk of credential leakage and simplifies credential management by using temporary, automatically rotated credentials.
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By Thomas Schiavone
Notifications are the lifeblood of modern apps. They re-engage users, keep them informed, and build trust. But most apps rely solely on push notifications—without an in-app inbox, critical updates can easily be lost. Push notifications grab attention in the moment—perfect for a flight delay, an account alert, or a message from a teammate. But they’re fleeting—once dismissed, they’re gone.
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By Mike Miller
I've been making apps since just after the App Store launched - it's actually what made me want to make apps in the first place. Looking back over this journey, it's amazing to see how much has changed. Let me take you through this evolution, because what's happening right now in mobile development is absolutely incredible.
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By The Courier Team
Twilio powers communication for over 10 million developers and 300,000 businesses worldwide. As a leader in customer engagement, they’ve set the standard for seamless, scalable developer tools. But as their business grew, managing notifications became a challenge. Fragmented tools and workflows created inconsistencies and inefficiencies across teams. To solve this, Twilio turned to Courier—a platform designed to unify notifications and improve the developer experience at scale.
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By Mike Miller
This month, we’re rolling out updates to our mobile SDKs with a focus on usability, reliability, and developer experience. Here’s a breakdown of the latest improvements for iOS, Android, React Native, and Flutter.
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By Seth Carney
Sending a notification is simple—sending it at the right time is not. Whether it’s avoiding off-hours pings or managing users across time zones, timing matters. With Courier’s new Delivery Window, you can deliver messages at the perfect moment—without the overhead of custom scheduling code. Set the Rules, We’ll Handle the Rest The Delivery Window feature lets you define when notifications should go out, and Courier ensures they follow your rules.
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By Sarah Barber
Push notifications have carved their own niche as a powerful tool for continuous user engagement. Regardless of whether an app is actively in use, they deliver your messages straight to your user's device. Two useful tools to enhance your push notification strategy are Segment and Courier. In this article, we show you how to set up Courier to listen to your Segment events and then send push notifications to an Android device based on data from these events.
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By Courier
See how Courier Journeys turns product events and user data into automated customer journeys for onboarding, activation, retention, and re-engagement. Build multi-step flows, add branching logic, personalize messages, and deliver across email, SMS, push, chat, and in-app from one workflow.
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By Courier
A walkthrough of Design Studio, Courier's multi-channel notification designer. Build and manage notification content for email, SMS, push, inbox, Slack, and Microsoft Teams from a single editor. In this video, we cover: Drag-and-drop content blocks for building templates fast Channel-specific editing with one-click switching Full HTML mode for email with live preview Test sends with real variable data Version history with visual side-by-side comparison Design Studio is in public beta and available in your Courier workspace today.
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By Courier
See how easy it is to add in-app toasts with the new Courier Toasts SDK. Learn to trigger real-time notifications, customize UI behavior, and connect toast messages to your in-app notification center for a unified user experience.
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By Courier
Courier’s new MCP Server is in beta. In this video, we demo how it works, walk through setup, and show how developers can start using it today. What you’ll learn: Courier helps you deliver notifications across email, SMS, push, chat, and in-app — all from a single API. The new MCP Server extends that flexibility, making it even easier to build and scale multi-channel notifications into your product.
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By Courier
See how easy it is to add a real-time notification center to your React app with the new Courier Inbox for Web. In this short demo, we’ll walk through installing the React SDK, authenticating with a JSON Web Token (JWT), and embedding the pop-up Inbox component right into your app’s header.
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By Courier
A quick overview of a tutorial that walks developers through building an iOS app and using Firebase and Courier to send push notifications.
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By Courier
Courier inbox is an in-app notification center for web and mobile apps. Use pre-built UI components and a powerful API to design a notification experience that perfectly matches your app and helps drive engagement.
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By Courier
We are embarking on a significant redesign of Courier's interface consisting of some new things, some old things in new places, and an overall reorganization of the information architecture. Here's a sneak peek.
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Built for developers, Courier is the fastest way to add multi-channel notifications to your web, desktop, or mobile app. With one API call, you can reach your users on any channel – email, SMS, push, chat, and more.
Courier lets you design your notifications once and deliver them to any channel–push notifications, direct messages, SMS, and email–with a single Courier API rather than having to integrate each provider API separately.
Design once, deliver to any channel through one API:
- Notification Design Studio: Empower every team member to build beautiful notifications.
- Cross-Channel Engagement Tracking: Get insight on your performance across all channels.
- Powerful Delivery Rules: Effortlessly route each message to the right notification channel using a robust rules engine. Change channels without touching your code.
The Smartest Way to Design & Deliver Notifications.