Push Notification Services · reliability comparison
Courier vs Firebase Cloud Messaging: which is more reliable? (2026)
Courier is more reliable than Firebase Cloud Messaging, scoring 97.5 vs 89.3 out of 100. Over the last 90 days Courier reported 2 incidents and Firebase Cloud Messaging reported 1, with effective uptime of 99.99% and 99.91% respectively. Courier resolves incidents faster on average (26m).
Data updated Nov 1, 2026 · How we score
VS
| Metric | Courier | Firebase Cloud Messaging |
|---|---|---|
| Reliability score | 97.5 | 89.3 |
| Rank (push notification services) | #2 | #4 |
| Uptime (90 days) | 99.99% | 99.91% |
| Incidents (90 days) | 2 | 1 |
| Partial / major outages | 0 | 1 |
| Avg time to resolve | 26m | 3h 51m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Courier and Firebase Cloud Messaging differ
- Courier reported 2× as many incidents as Firebase Cloud Messaging over the last 90 days (2 vs 1).
- Firebase Cloud Messaging had 1 partial or major outage, compared with 0 for Courier.
- Courier fixes problems faster: 26m on average, against 3h 51m for Firebase Cloud Messaging (8.9× quicker).
- Courier's longest outage on record lasted 3h 7m (Feb 2, 2026); Firebase Cloud Messaging's lasted 3d (Mar 8, 2026).
90-day uptime
Courier
Firebase Cloud Messaging
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Courier incidents
- Degraded performanceOct 10, 2026 · resolved in 15m
Affected: API
- Degraded performanceOct 9, 2026 · resolved in 37m
Affected: API
Recent Firebase Cloud Messaging incidents
- Partial outageSep 1, 2026 · resolved in 3h 51m
RESOLVED: Firebase Cloud Messaging - low availability in North America
Affected: Cloud Messaging
Other push notification services to consider
- Novu · #1 · 100% uptime
- Expo Push Notifications · #3 · 99.93% uptime
- Batch · #5 · 99.83% uptime
- Airship · #6 · 99.81% uptime
See the full most reliable push notification services ranking →