Guide
FCM vs Web Push: Which Notification Channel Should You Use?
FCM and Web Push are often discussed as if they solve the same problem. They overlap, but they are not identical. Web Push is the browser standard. FCM is Google's push platform and is essential for many Android and Firebase-based flows.
Where each channel fits
Use Web Push for websites and progressive web apps that run in browsers. It relies on service workers, browser subscriptions, and VAPID. It is the natural choice when your user is primarily using Chrome, Edge, Firefox, or another browser that supports the standard.
Use FCM for Android apps and many Firebase-backed mobile architectures. FCM handles native device tokens and integrates with mobile app lifecycle patterns. If your product has both a website and a mobile app, you may need both channels rather than choosing only one.
A hybrid architecture
DNZ Notifications is designed around recipient IDs and device records. A recipient can have a browser Web Push subscription, a mobile background connection, an FCM token, or APNs credentials depending on platform. The backend should decide which route is available and queue delivery accordingly.
This model avoids building separate notification systems for each platform. Your application sends one logical notification to `recipientId`, and the notification service chooses the route based on registered devices and credentials.
{
"recipientId": "user_123",
"channel": "push",
"title": "Security alert",
"body": "A new device signed in to your account.",
"data": {
"type": "security_alert",
"url": "/account/security"
}
}Operational differences
Web Push subscriptions can expire or change when the browser resets site data. Your frontend should be able to register again. FCM tokens can also rotate, so mobile apps need token refresh handling. Both channels require logs because queued does not always mean delivered.
When comparing channels, do not look only at delivery. Look at user consent, platform support, content previews, background restrictions, and how easily your team can troubleshoot failed deliveries.
Decision guide
If you have a website only, start with Web Push. If you have an Android app, add FCM. If you have iOS, add APNs. If you have all of them, use a unified notification API with per-device routing so product code does not care about the underlying channel.
The important engineering decision is to store recipient identity separately from device transport. Users change devices, browsers, and tokens. Recipient-level sending keeps product logic stable while transport details evolve.
FAQ
Is FCM the same as Web Push?
No. Web Push is a browser standard. FCM is Google's messaging platform and also powers many Android flows.
Do websites need FCM?
Not always. Standards-based Web Push with VAPID is enough for many websites.
Can one user have multiple notification devices?
Yes. A single recipientId can map to multiple browser and mobile devices.
Related content
Use one API for multiple push routes
DNZ Notifications prepares Web Push, FCM, APNs, logs, templates, and subscriber records under one dashboard.
Open notifications