Business Phone Systems · reliability comparison
JustCall vs Vonage Business Communications: which is more reliable? (2026)
JustCall is more reliable than Vonage Business Communications, scoring 93.4 vs 73.0 out of 100. Over the last 90 days JustCall reported 4 incidents and Vonage Business Communications reported 3, with effective uptime of 99.96% and 99.72% respectively. JustCall resolves incidents faster on average (1h 18m).
Data updated Nov 1, 2026 · How we score
| Metric | JustCall | Vonage Business Communications |
|---|---|---|
| Reliability score | 93.4 | 73.0 |
| Rank (business phone systems) | #2 | #9 |
| Uptime (90 days) | 99.96% | 99.72% |
| Incidents (90 days) | 4 | 3 |
| Partial / major outages | 0 | 0 |
| Avg time to resolve | 1h 18m | 13h 24m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where JustCall and Vonage Business Communications differ
- JustCall reported 33% more incidents than Vonage Business Communications over the last 90 days (4 vs 3).
- JustCall fixes problems faster: 1h 18m on average, against 13h 24m for Vonage Business Communications (10.3× quicker).
- JustCall's longest outage on record lasted 12m (Mar 9, 2026); Vonage Business Communications's lasted 3d (Jan 21, 2026).
90-day uptime
JustCall
Vonage Business Communications
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent JustCall incidents
- Degraded performanceOct 27, 2026 · resolved in 40m
Failures in incoming and outgoing calls
Affected: JustCall Dashboard, JustCall Live Dashboard
- Degraded performanceOct 22, 2026 · resolved in 39m
Affected: Outbound Calling, SMS Service, JustCall Dashboard, Contact sync with CRMs, help desks and other integrations, Inbound Calling, MMS Service +1 more
- Degraded performanceSep 1, 2026 · resolved in 29m
Partial Degradation of Calling, SalesDialer, and Inbound Call Services
Affected: Inbound Calling, Sales Dialer
- Degraded performanceAug 18, 2026 · resolved in 3h 23m
Slowness reported across platform
Affected: Outbound Calling, SMS Service, JustCall Dashboard, Inbound Calling, MMS Service, Sales Dialer
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
- CloudTalk · #3 · 99.91% uptime
- GoTo Connect · #4 · 99.87% uptime
- Quo (formerly OpenPhone) · #5 · 99.83% uptime