Push Notification Services · 2026 reliability ranking
Most Reliable Push Notification Services (2026)
We ranked 13 push notification services by real-world reliability over the last 90 days, using 35 status page incidents and our own around-the-clock uptime checks. Push notification services deliver the alerts your app or website sends to customers' phones and browsers, from order and appointment updates to login codes and promotions. When the service is down or delayed, time-sensitive messages arrive late or never, and a promotion that lands hours after a sale ends or a missing delivery update quickly turns into support tickets and lost orders. Every one of these services also depends on Apple's and Google's delivery networks, so it is worth checking how each vendor handles and reports problems upstream.
Last updated Nov 1, 2026 · How we score
| # | Vendor | Score | Uptime (90d) |
|---|---|---|---|
| 1 | NovuNovu is an open-source notification infrastructure platform, with a hosted cloud service, for sending push, email, SMS, chat and in-app notifications. | 100.0 | 100% |
| 2 | CourierCourier is a notification API platform for routing product notifications across push, email, SMS, Slack and in-app inbox channels. | 97.5 | 99.99% |
| 3 | Expo Push NotificationsExpo Push Notifications is the push notification service from Expo, the React Native app platform, which forwards messages to Apple's and Google's push networks. | 90.8 | 99.93% |
| 4 | Firebase Cloud MessagingFirebase Cloud Messaging (FCM) is Google's free service for sending push notifications to Android, iOS and web apps. | 89.3 | 99.91% |
| 5 | BatchBatch is a Paris-based customer engagement platform for mobile push, in-app, email and SMS messaging. | 82.7 | 99.83% |
| 6 | AirshipAirship (formerly Urban Airship) is a Portland, Oregon-based mobile app engagement platform for push notifications, in-app messages and mobile wallet passes. | 79.8 | 99.81% |
| 7 | BrazeBraze is a New York-based customer engagement platform for sending cross-channel messages such as push notifications, email, SMS and in-app messages based on user data and behaviour. | 78.0 | 99.65% |
| 8 | OneSignalOneSignal is a San Mateo, California-based messaging platform for mobile push, web push, in-app messages, email and SMS. | 77.2 | 99.75% |
| 9 | KnockKnock is a notification infrastructure API for sending product notifications across push, email, SMS, chat and in-app feeds from one workflow. | 60.8 | 99.18% |
Push Notification Services reliability at a glance
- Across the 9 ranked push notification services, average 90-day uptime is 99.78%. Reliability scores range from 100.0 (Novu) to 60.8 (Knock).
- Together they published 35 incidents in the last 90 days, 12 of them partial or major outages.
- Novu reported no incidents at all in that time.
- The typical vendor takes 3h 21m to resolve an incident. Courier is fastest, at 26m on average.
- Batch reported the most incidents (12 in 90 days).
What to check before you choose a push notification service
- Look at incidents on message delivery and the sending API first; dashboard and analytics delays are an annoyance, not a lost message.
- Ask whether messages that fail during an outage are queued and retried, and whether time-sensitive alerts can be given priority over bulk campaigns.
- Check how the vendor reports problems with Apple (APNs) and Google (FCM) delivery, since those affect every provider and good vendors post them openly.
- If you send critical alerts such as login codes or order updates, keep a second channel like SMS or email as a fallback and subscribe to the vendor's status page.
90-day uptime history
Each bar is one day. Hover a bar for that day's uptime and incidents.
1. Novu
100% uptime · 0 incidents · avg resolve —2. Courier
99.99% uptime · 2 incidents · avg resolve 26m3. Expo Push Notifications
99.93% uptime · 4 incidents · avg resolve 2h 20m4. Firebase Cloud Messaging
99.91% uptime · 1 incidents · avg resolve 3h 51m5. Batch
99.83% uptime · 12 incidents · avg resolve 1h 39m6. Airship
99.81% uptime · 3 incidents · avg resolve 8h 54m7. Braze
99.65% uptime · 4 incidents · avg resolve 2h 52m8. OneSignal
99.75% uptime · 5 incidents · avg resolve 5h 34m9. Knock
99.18% uptime · 4 incidents · avg resolve 8h 49m- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Being tracked (not ranked yet)
These vendors join the ranking once we have enough evidence: at least 14 days of data, and for vendors with a quiet status page (silent for a year, or for 90 days while their competitors report several incidents), 30 days of our own independent monitoring.
- MagicBell · quiet status page, awaiting our own monitoring
- Pusher Beams · quiet status page, awaiting our own monitoring
- Webpushr · quiet status page, awaiting our own monitoring
- Pushwoosh
Recent Push Notification Services incidents
Affected: In-app feeds and guides
Delayed and duplicate Android push notifications (Transactional API)
Precautionary temporary restriction of file uploads in the dashboard
Processing delays for profile updates
Affected: [CEP] Profile API, Data ingestion, Event Targeting & Retargeting
Affected: Analytics & Reporting, Dashboard / UI, Email, Integrations, APIs & SDK Endpoints, SMS +2 more
Delays in file-based audience imports
Affected: Custom Audiences, Audiences
Affected: API
Affected: API
Head-to-head comparisons
- Novu vs Courier reliability
- Novu vs Expo Push Notifications reliability
- Novu vs Firebase Cloud Messaging reliability
- Novu vs Batch reliability
- Courier vs Expo Push Notifications reliability
- Courier vs Firebase Cloud Messaging reliability
- Courier vs Batch reliability
- Expo Push Notifications vs Firebase Cloud Messaging reliability
- Expo Push Notifications vs Batch reliability
- Firebase Cloud Messaging vs Batch reliability
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Frequently asked questions
What is the most reliable push notification service?
Based on the last 90 days of data, Novu is the most reliable push notification service we track, with a reliability score of 100.0/100 and 100% uptime.
How do you measure push notification service reliability?
We poll each vendor's public status page every few minutes, record every incident, and run our own uptime checks against each vendor's login and customer-facing pages. Uptime (40%), incident frequency (20%), average time to resolve (20%) and transparency (20%) combine into one score out of 100.
How often are these rankings updated?
Continuously. Status pages and uptime checks run every five minutes and scores are recalculated several times an hour.
Can vendors pay to rank higher?
No. Sponsored placements are clearly labelled, shown separately from the rankings and never change a vendor's score.