Push Notification Services · reliability comparison
Courier vs Knock: which is more reliable? (2026)
Courier is more reliable than Knock, scoring 97.5 vs 60.8 out of 100. Over the last 90 days Courier reported 2 incidents and Knock reported 4, with effective uptime of 99.99% and 99.18% respectively. Courier resolves incidents faster on average (26m).
Data updated Nov 2, 2026 · How we score
| Metric | Courier | Knock |
|---|---|---|
| Reliability score | 97.5 | 60.8 |
| Rank (push notification services) | #3 | #10 |
| Uptime (90 days) | 99.99% | 99.18% |
| Incidents (90 days) | 2 | 4 |
| Partial / major outages | 0 | 4 |
| Avg time to resolve | 26m | 8h 49m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Courier and Knock differ
- Knock reported 2× as many incidents as Courier over the last 90 days (4 vs 2).
- Knock had 4 partial or major outages, compared with 0 for Courier.
- Courier fixes problems faster: 26m on average, against 8h 49m for Knock (20.4× quicker).
- Courier's longest outage on record lasted 3h 7m (Feb 2, 2026); Knock's lasted 1d 6h (Oct 1, 2026).
90-day uptime
Courier
Knock
- 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 Knock incidents
- Partial outageOct 29, 2026 · resolved in 1h 34m
Affected: In-app feeds and guides
- Partial outageOct 1, 2026 · resolved in 1d 6h
Warehouse message synchronization delayedofficial update ↗
Affected: Data warehouse synchronization
- Partial outageSep 21, 2026 · resolved in 1h 3m
Knock dashboard login magic links are unavailable
Affected: Dashboard
- Partial outageAug 31, 2026 · resolved in 1h 45m
Workflow processing and message delivery errors
Affected: Notification delivery, Link and open tracking
- MaintenanceJul 20, 2026 · ongoing
Queueing infrastructure maintenance
Affected: Webhook delivery, Notification delivery
Other push notification services to consider
- Novu · #1 · 100% uptime
- Pushwoosh · #2 · 99.99% uptime
- Expo Push Notifications · #4 · 99.93% uptime
- Firebase Cloud Messaging · #5 · 99.91% uptime
See the full most reliable push notification services ranking →