Business Phone Systems · reliability comparison
JustCall vs Ooma Office: which is more reliable? (2026)
JustCall is more reliable than Ooma Office, scoring 93.4 vs 80.0 out of 100. Over the last 90 days JustCall reported 4 incidents and Ooma Office reported 0, with effective uptime of 99.96% and 100% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | JustCall | Ooma Office |
|---|---|---|
| Reliability score | 93.4 | 80.0 |
| Rank (business phone systems) | #2 | — |
| Uptime (90 days) | 99.96% | 100% |
| Incidents (90 days) | 4 | 0 |
| Partial / major outages | 0 | 0 |
| Avg time to resolve | 1h 18m | — |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 0/100 |
Where JustCall and Ooma Office differ
- Ooma Office reported no incidents in the last 90 days, while JustCall reported 4.
90-day uptime
JustCall
Ooma Office
- 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 Ooma Office incidents
No incidents reported by Ooma Office in the last 90 days.
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