SMS & Voice APIs · reliability comparison
Telesign vs Vonage Communications APIs: which is more reliable? (2026)
Telesign is more reliable than Vonage Communications APIs, scoring 89.4 vs 53.7 out of 100. Over the last 90 days Telesign reported 8 incidents and Vonage Communications APIs reported 24, with effective uptime of 99.91% and 99.10% respectively. Telesign resolves incidents faster on average (1h 27m).
Data updated Nov 1, 2026 · How we score
| Metric | Telesign | Vonage Communications APIs |
|---|---|---|
| Reliability score | 89.4 | 53.7 |
| Rank (SMS & voice APIs) | #3 | #9 |
| Uptime (90 days) | 99.91% | 99.10% |
| Incidents (90 days) | 8 | 24 |
| Partial / major outages | 1 | 0 |
| Avg time to resolve | 1h 27m | 10h 44m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Telesign and Vonage Communications APIs differ
- Vonage Communications APIs reported 3× as many incidents as Telesign over the last 90 days (24 vs 8).
- Telesign had 1 partial or major outage, compared with 0 for Vonage Communications APIs.
- Telesign fixes problems faster: 1h 27m on average, against 10h 44m for Vonage Communications APIs (7.4× quicker).
- Telesign's longest outage on record lasted 3h 36m (Oct 3, 2026); Vonage Communications APIs's lasted 4h 36m (Jun 12, 2026).
90-day uptime
Telesign
Vonage Communications APIs
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Telesign incidents
- InformationalOct 22, 2026 · resolved in 4m
Affected: Verify API
- InformationalOct 21, 2026 · resolved in <1m
Affected: Voice, Voice verify
- InformationalOct 17, 2026 · resolved in <1m
Affected: Phone ID, SMS, SMS Verify
- Degraded performanceOct 16, 2026 · resolved in 22m
Affected: Intelligence, Phone ID, Phone ID Contact, Phone ID Live, Phone ID Number deactivation, Phone ID Porting status +3 more
- MaintenanceOct 15, 2026 · resolved (duration not published)
[Scheduled] Regulatory Update 📢 Australia and ACMA's SMS Sender ID Register - May 2026
- InformationalOct 14, 2026 · resolved in 28m
Affected: EMEA - All countries, APAC - All countries, NA & LATAM - All countries
Recent Vonage Communications APIs incidents
- MaintenanceNov 1, 2026 · resolved (duration not published)
[Scheduled] UK SMS - Planned maintenance affecting O2 network
- MaintenanceNov 1, 2026 · resolved (duration not published)
[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
- MaintenanceOct 30, 2026 · resolved in 5h
[Scheduled] USA SMS - Planned Maintenance affecting Verizon network
Other SMS & voice APIs to consider
- Plivo · #1 · 100% uptime
- SignalWire · #2 · 99.94% uptime
- Textmagic · #4 · 99.82% uptime
- Africa's Talking · #5 · 99.80% uptime