
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. If a user is busy or distracted, that information is lost, along with the opportunity to engage them.
An in-app inbox solves this. Unlike push notifications, an inbox provides a persistent record—a place users can revisit to see what they missed. It ensures important updates aren’t lost, helps users prioritize, and creates a seamless notification experience: push drives immediacy, while the inbox provides depth and context.
This is a big reason why we built Courier Inbox. Let’s look at a few ways that push notifications and in-app notifications (Courier Inbox) can work together.
B2C companies have mastered push notifications and in-app inboxes to drive engagement and keep users informed. B2B, on the other hand, often treats notifications as transactional, missing opportunities to create seamless, user-friendly experiences.
Airbnb and Starbucks show how to do it right—using push to grab attention and in-app inboxes to provide continuity. Their approach offers a playbook for B2B companies looking to improve communication, ensure critical updates are seen, and build better user experiences.
Let’s look at three ways we can learn from them
Push notifications drive urgency and encourage quick responses.
Examples from B2C Products:
How to Apply It for B2B:
Push notifications drive critical actions in business workflows:
An in-app inbox stores important updates, providing users with a centralized hub to revisit key information.
Examples from B2C Products:
How to Apply It for B2B:
A notification center serves as a persistent feed of important updates:
Tailored notifications make users feel valued and ensure messages are relevant.
Examples from B2C Products:
How to Apply It for B2B:
Personalization in B2B notifications means delivering role-based updates:
Building a notification system from scratch is deceptively complex. Many teams start out thinking it’s just about sending messages, but the deeper they go, the more challenges emerge. It’s also not just about building it, once it’s built, you gotta maintain it.
Some of the biggest challenges include:
At Courier, we set out to build an in-app notification platform that makes adding real-time notifications easy and fully customizable, ensuring they feel native to your app. Basically, what would we as developers expect. Here’s what we thought about when building Courier Inbox:
That’s why we built Courier Inbox: to take the complexity out of notifications. Real-time updates, cross-platform SDKs, and full customization—without the overhead. Give users the notifications they need, when they need them. No missed messages, no unnecessary complexity. Just a seamless experience across every platform.
If you’re ready to build notifications that users love, Courier makes it easy.

WhatsApp pricing changes on October 1, 2026
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Clinical alert and notification systems: how escalation works
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Courier vs Customer.io: 2026 messaging platform comparison
Courier and Customer.io both send across email, push, SMS, and in-app, but they are not priced or built the same way. Courier bills by the send, puts journeys, experiments, broadcasts, an in-app inbox, preferences, and 50+ delivery providers on one platform, and exposes all of it through an API, a CLI, and an MCP server. Customer.io bills by the number of profiles in your database and fits a marketing team that needs deep behavioral segmentation. This comparison covers pricing, journeys, channels, in-app messaging, localization, and preferences, with every competitor figure linked to Customer.io's own pages.