SMS & Voice APIs · reliability comparison
SignalWire vs Telesign: which is more reliable? (2026)
SignalWire is more reliable than Telesign, scoring 92.1 vs 89.4 out of 100. Over the last 90 days SignalWire reported 3 incidents and Telesign reported 8, with effective uptime of 99.94% and 99.91% respectively. SignalWire resolves incidents faster on average (47m).
Data updated Nov 1, 2026 · How we score
| Metric | SignalWire | Telesign |
|---|---|---|
| Reliability score | 92.1 | 89.4 |
| Rank (SMS & voice APIs) | #2 | #3 |
| Uptime (90 days) | 99.94% | 99.91% |
| Incidents (90 days) | 3 | 8 |
| Partial / major outages | 3 | 1 |
| Avg time to resolve | 47m | 1h 27m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where SignalWire and Telesign differ
- Telesign reported 2.7× as many incidents as SignalWire over the last 90 days (8 vs 3).
- SignalWire had 3 partial or major outages, compared with 1 for Telesign.
- SignalWire fixes problems faster: 47m on average, against 1h 27m for Telesign.
- SignalWire's longest outage on record lasted 1h 59m (Aug 14, 2026); Telesign's lasted 3h 36m (Oct 3, 2026).
90-day uptime
SignalWire
Telesign
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent SignalWire incidents
- Partial outageOct 23, 2026 · resolved in 10m
Dashboard analytics unavailable
Affected: Website
- Partial outageOct 5, 2026 · resolved in 14m
Resolved: underlying infrastructure issue resulted in an interruption to all services.
Affected: AI, APIs, MMS, SIP Connectivity, SMS, Video and Conferencing +1 more
- Partial outageAug 14, 2026 · resolved in 1h 59m
Degraded: outbound calls and fax
Affected: APIs
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 · #4 · 99.82% uptime
- Africa's Talking · #5 · 99.80% uptime
- Infobip · #6 · 99.73% uptime