SMS & Voice APIs · reliability comparison
Sinch vs Telesign: which is more reliable? (2026)
Telesign is more reliable than Sinch, scoring 89.4 vs 61.1 out of 100. Over the last 90 days Sinch reported 20 incidents and Telesign reported 8, with effective uptime of 99.40% and 99.91% respectively. Telesign resolves incidents faster on average (1h 27m).
Data updated Nov 1, 2026 · How we score
| Metric | Sinch | Telesign |
|---|---|---|
| Reliability score | 61.1 | 89.4 |
| Rank (SMS & voice APIs) | #7 | #2 |
| Uptime (90 days) | 99.40% | 99.91% |
| Incidents (90 days) | 20 | 8 |
| Partial / major outages | 3 | 1 |
| Avg time to resolve | 4h 51m | 1h 27m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Sinch and Telesign differ
- Sinch reported 2.5× as many incidents as Telesign over the last 90 days (20 vs 8).
- Sinch had 3 partial or major outages, compared with 1 for Telesign.
- Telesign fixes problems faster: 1h 27m on average, against 4h 51m for Sinch (3.3× quicker).
- Sinch's longest outage on record lasted 5h 56m (Jun 9, 2026); Telesign's lasted 3h 36m (Oct 3, 2026).
90-day uptime
Sinch
Telesign
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Sinch incidents
- 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)
- MaintenanceOct 26, 2026 · resolved in 1h
- Partial outageOct 26, 2026 · resolved in 2h 32m
Service Degradation - Customer Dashboard and Account Balance
Affected: Payment, SMS - APAC, SMS Administration, SMS - EMEA, Numbers Administration, SMS - LATAM +10 more
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
Other SMS & voice APIs to consider
- Plivo · #1 · 100% uptime
- Textmagic · #3 · 99.82% uptime
- Africa's Talking · #4 · 99.80% uptime
- Infobip · #5 · 99.73% uptime