SMS & Voice APIs · reliability comparison
Sinch vs Vonage Communications APIs: which is more reliable? (2026)
Sinch is more reliable than Vonage Communications APIs, scoring 61.1 vs 53.7 out of 100. Over the last 90 days Sinch reported 20 incidents and Vonage Communications APIs reported 24, with effective uptime of 99.40% and 99.10% respectively. Sinch resolves incidents faster on average (4h 51m).
Data updated Nov 2, 2026 · How we score
| Metric | Sinch | Vonage Communications APIs |
|---|---|---|
| Reliability score | 61.1 | 53.7 |
| Rank (SMS & voice APIs) | #8 | #9 |
| Uptime (90 days) | 99.40% | 99.10% |
| Incidents (90 days) | 20 | 24 |
| Partial / major outages | 3 | 0 |
| Avg time to resolve | 4h 51m | 10h 44m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Sinch and Vonage Communications APIs differ
- Vonage Communications APIs reported 20% more incidents than Sinch over the last 90 days (24 vs 20).
- Sinch had 3 partial or major outages, compared with 0 for Vonage Communications APIs.
- Sinch fixes problems faster: 4h 51m on average, against 10h 44m for Vonage Communications APIs (2.2× quicker).
- Sinch's longest outage on record lasted 5h 56m (Jun 9, 2026); Vonage Communications APIs's lasted 4h 36m (Jun 12, 2026).
90-day uptime
Sinch
Vonage Communications APIs
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Sinch incidents
- MaintenanceNov 2, 2026 · resolved (duration not published)
- MaintenanceNov 1, 2026 · resolved in 7h 30m
- MaintenanceOct 29, 2026 · resolved in 15m
- MaintenanceOct 29, 2026 · resolved in 4h
- MaintenanceOct 27, 2026 · resolved in 2h 1m
- MaintenanceOct 26, 2026 · resolved (duration not published)
Recent Vonage Communications APIs incidents
- MaintenanceNov 2, 2026 · resolved in 1h
[Scheduled] Japan SMS - Planned Maintenance affecting SoftBank
- MaintenanceNov 1, 2026 · resolved in 7h 30m
[Scheduled] UK SMS - Planned maintenance affecting O2 network
- MaintenanceNov 1, 2026 · resolved in 3h 30m
[Scheduled] Belarus SMS - Planned Maintenance affecting Life
- MaintenanceNov 1, 2026 · resolved in 2h
[Scheduled] Philippines SMS - Planned maintenance affecting Globe Telecom
- MaintenanceNov 1, 2026 · resolved in 6h 1m
[Scheduled] Malaysia SMS - Planned maintenance affecting SMS for CelcomDigi
- MaintenanceOct 30, 2026 · resolved in 1h
[Scheduled] Japan SMS - Planned Maintenance affecting SoftBank
Other SMS & voice APIs to consider
- Plivo · #1 · 100% uptime
- SignalWire · #2 · 99.94% uptime
- Telesign · #3 · 99.91% uptime
- Textmagic · #4 · 99.82% uptime