Business Phone Systems · reliability comparison
8x8 vs JustCall: which is more reliable? (2026)
JustCall is more reliable than 8x8, scoring 93.4 vs 90.0 out of 100. Over the last 90 days 8x8 reported 0 incidents and JustCall reported 4, with effective uptime of 100% and 99.96% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | 8x8 | JustCall |
|---|---|---|
| Reliability score | 90.0 | 93.4 |
| Rank (business phone systems) | — | #2 |
| Uptime (90 days) | 100% | 99.96% |
| Incidents (90 days) | 0 | 4 |
| Partial / major outages | 0 | 0 |
| Avg time to resolve | — | 1h 18m |
| Outages we detected | 0 | 0 |
| Transparency score | 50/100 | 100/100 |
Where 8x8 and JustCall differ
- 8x8 reported no incidents in the last 90 days, while JustCall reported 4.
90-day uptime
8x8
JustCall
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent 8x8 incidents
No incidents reported by 8x8 in the last 90 days.
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
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