About 16; min
OneSignal and Firebase Cloud Messaging both promise to keep your users in the loop — but they take very different paths to get there. OneSignal started as a push notification specialist and grew into a full messaging platform. Firebase Cloud Messaging (FCM) is Google’s built-in notification backbone, tightly woven into the Firebase suite.
If you’re choosing between them in 2026, the decision often comes down to how much control you want versus how deep you are in the Google world. Let’s break down what each costs, what each does best, and which one fits your stack.
Both tools handle millions of messages daily for apps of all sizes. OneSignal powers notifications for companies like Zynga, Tribune Media, and Nexon. Firebase Cloud Messaging is the default notification layer for most Android apps and works across iOS and the web as well.
Quick Pricing Overview
| Plan | OneSignal | Firebase Cloud Messaging |
|---|---|---|
| Free Tier | Unlimited push, 10K email/mo | Completely free (unlimited messages) |
| Growth | $9/mo (50K subscribers) | N/A — FCM itself stays free |
| Professional | $99/mo (150K subscribers) | Blaze pay-as-you-go (for other Firebase services) |
| Enterprise | Custom pricing | Custom (via Google Cloud) |
OneSignal Pricing Breakdown
OneSignal’s free plan gives you unlimited mobile push notifications with basic segmentation. The Growth plan at $9 per month adds advanced analytics, A/B testing for messages, and supports up to 50,000 email subscribers. Professional at $99 per month includes Intelligent Delivery (send-time AI), throttling controls, and confirmed delivery tracking. Enterprise tiers add dedicated infrastructure, a customer success manager, and SLA guarantees. Email and SMS channels carry separate volume-based pricing on top of the base plan.
Firebase Cloud Messaging Pricing Breakdown
FCM itself is entirely free — no cap on messages, no cap on devices. You can send push notifications to Android, iOS, and web without paying a cent. The catch is that FCM is just the delivery pipe. If you want analytics beyond basic delivery stats, you’ll pay for Google Analytics or BigQuery exports on the Blaze plan. Cloud Functions that trigger notifications cost per invocation ($0.40 per million). Remote Config, A/B testing for notifications, and Crashlytics are free but live inside the broader Firebase billing umbrella.
Feature Comparison
| Feature | OneSignal | Firebase Cloud Messaging |
|---|---|---|
| Push Notifications | Unlimited (all plans) | Unlimited (free) |
| Email Channel | Built-in (10K free, then paid) | Not included (use SendGrid, etc.) |
| SMS Channel | Available (paid add-on) | Not included |
| In-App Messaging | Yes (Growth+) | Yes (Firebase In-App Messaging) |
| Segmentation | Tags, filters, data attributes | Topics, device groups, conditions |
| A/B Testing | Built-in (Growth+) | Via Firebase A/B Testing (free) |
| Send-Time AI | Intelligent Delivery (Pro+) | Not available |
| Analytics | Built-in dashboard | Basic; advanced via GA4/BigQuery |
| API Access | REST API + SDKs | REST API + Admin SDKs |
| Web Push | Yes (Chrome, Firefox, Safari) | Yes (Chrome, Firefox; Safari limited) |
| Multi-Platform | iOS, Android, Web, React Native, Flutter | iOS, Android, Web, Flutter |
Cost Scenarios
Startup with 5,000 users
On OneSignal, the free plan covers you completely — unlimited push with basic targeting and up to 10,000 emails per month. On Firebase, FCM is free too, and Cloud Functions at this scale would stay within the free tier of 2 million invocations per month. If you need email, you’d add a third-party sender like SendGrid (free up to 100/day). Both cost $0 for push alone.
Growing app with 80,000 subscribers
OneSignal’s Growth plan at $9 per month covers up to 50K subscribers; you’d need the Professional tier at $99 per month to support 80K with advanced features. Firebase keeps FCM free, but BigQuery exports for analytics might run $5-15 per month depending on query volume. OneSignal: ~$99/mo vs Firebase: ~$10/mo (FCM free + analytics costs).
Enterprise with 500,000+ devices
OneSignal moves to custom enterprise pricing — expect $500-2,000+ per month depending on features, SLA requirements, and dedicated sending infrastructure. You get a named account manager, uptime guarantees, and priority support. Firebase FCM stays free for delivery, but Cloud Functions at high invocation volumes, BigQuery storage and queries for analytics, and premium Google Cloud support at this scale could run $100-500 per month combined. OneSignal: $500-2,000/mo vs Firebase: $100-500/mo for the full notification stack.
Setup and Integration
Getting started with OneSignal takes about 15 minutes. You create an account, add your app’s platform credentials (APNs certificate for iOS, FCM server key for Android), drop in the SDK, and you’re sending test pushes. The web dashboard handles everything from segment creation to message scheduling without touching code.
Firebase Cloud Messaging requires a Firebase project, which most mobile developers already have. Adding FCM to an existing Firebase app means enabling the messaging module and requesting notification permissions. The setup is straightforward if you know Firebase, but building features like scheduled sends or user segmentation means writing Cloud Functions yourself.
For teams without dedicated mobile engineers, OneSignal’s visual tools save significant development time. For teams already running on Firebase, adding FCM is a natural extension that avoids introducing another vendor into the stack.
Who Should Pick What
Pick OneSignal if:
- You want push, email, and SMS in a single dashboard
- Your marketing team needs a no-code message builder
- Send-time AI and advanced A/B testing matter to your engagement metrics
- You’re not already deep in the Google/Firebase world
Pick Firebase Cloud Messaging if:
- Your app already runs on Firebase (Auth, Firestore, Hosting)
- Budget is the primary concern — FCM is genuinely free
- You have developers comfortable writing Cloud Functions for notification logic
- You handle email and SMS through separate services anyway
Firebase Cloud Messaging wins on pure cost — it’s hard to beat free at any scale. But OneSignal wins on convenience and breadth, bundling multiple channels with a polished UI that marketing teams can use without engineering help. If you’re building inside the Firebase world, FCM is the obvious choice. If you want an all-in-one messaging platform that non-developers can run, OneSignal earns its price tag.
FAQ
Is Firebase Cloud Messaging really free?
Yes. FCM charges nothing for message delivery regardless of volume. Costs come from related Firebase services like Cloud Functions or BigQuery if you use them.
Can I use OneSignal with Firebase?
Yes. Many developers use OneSignal as their notification management layer while FCM handles the actual Android delivery under the hood. OneSignal requires an FCM server key for Android push.
Which has better deliverability?
FCM has a slight edge on Android since it’s native to the platform. OneSignal uses FCM for Android delivery anyway, so the difference is mainly on the web and iOS side where OneSignal’s Intelligent Delivery can improve open rates.
Does OneSignal support Safari web push?
Yes. OneSignal added Safari web push support after Apple enabled the Web Push API in Safari 16.4. Firebase’s web push support for Safari is more limited.
