Business Phone Systems · reliability comparison
Quo (formerly OpenPhone) vs Vonage Business Communications: which is more reliable? (2026)
Quo (formerly OpenPhone) is more reliable than Vonage Business Communications, scoring 83.4 vs 73.0 out of 100. Over the last 90 days Quo (formerly OpenPhone) reported 9 incidents and Vonage Business Communications reported 3, with effective uptime of 99.83% and 99.72% respectively. Quo (formerly OpenPhone) resolves incidents faster on average (1h 12m).
Data updated Nov 1, 2026 · How we score
| Metric | Quo (formerly OpenPhone) | Vonage Business Communications |
|---|---|---|
| Reliability score | 83.4 | 73.0 |
| Rank (business phone systems) | #5 | #9 |
| Uptime (90 days) | 99.83% | 99.72% |
| Incidents (90 days) | 9 | 3 |
| Partial / major outages | 4 | 0 |
| Avg time to resolve | 1h 12m | 13h 24m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Quo (formerly OpenPhone) and Vonage Business Communications differ
- Quo (formerly OpenPhone) reported 3× as many incidents as Vonage Business Communications over the last 90 days (9 vs 3).
- Quo (formerly OpenPhone) had 4 partial or major outages, compared with 0 for Vonage Business Communications.
- Quo (formerly OpenPhone) fixes problems faster: 1h 12m on average, against 13h 24m for Vonage Business Communications (11.1× quicker).
- Quo (formerly OpenPhone)'s longest outage on record lasted 3d (Jul 24, 2026); Vonage Business Communications's lasted 3d (Jan 21, 2026).
90-day uptime
Quo (formerly OpenPhone)
Vonage Business Communications
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Quo (formerly OpenPhone) incidents
- Degraded performanceOct 17, 2026 · resolved in 37m
Elevated calling errors within the APAC region
Affected: Calling
- InformationalOct 15, 2026 · resolved in 10d 20h
- Degraded performanceOct 14, 2026 · resolved in 1h 11m
Affected: Text Messaging
- Major outageOct 1, 2026 · resolved in 53m
Affected: Calling
- Degraded performanceSep 27, 2026 · resolved in 2h 5m
Affected: Android App, Mac App, IOS App, Website
- InformationalSep 17, 2026 · resolved in 6d 18h
Recent Vonage Business Communications incidents
- Degraded performanceOct 23, 2026 · resolved in 21h 12m
Inbound Call Completion Issues — Select Canadian Regions
Affected: Inbound Call Completion
- Degraded performanceOct 5, 2026 · resolved in 17h 48m
Vonage Mobile App Intermittently Not Sending Notifications
Affected: Mobile App (Android™), Mobile App (iOS)
- Degraded performanceSep 3, 2026 · resolved in 1h 13m
Account Features Not Updating for Some Accounts
Affected: Call Forwarding, Virtual Receptionist, Call Queues, Receptionist Console
Other business phone systems to consider
- Grasshopper · #1 · 99.96% uptime
- JustCall · #2 · 99.96% uptime
- CloudTalk · #3 · 99.91% uptime
- GoTo Connect · #4 · 99.87% uptime