Appointment Scheduling Software · reliability comparison
Acuity Scheduling vs Sign In Scheduling (formerly 10to8): which is more reliable? (2026)
Sign In Scheduling (formerly 10to8) is more reliable than Acuity Scheduling, scoring 100.0 vs 45.5 out of 100. Over the last 90 days Acuity Scheduling reported 7 incidents and Sign In Scheduling (formerly 10to8) reported 0, with effective uptime of 98.16% and 100% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | Acuity Scheduling | Sign In Scheduling (formerly 10to8) |
|---|---|---|
| Reliability score | 45.5 | 100.0 |
| Rank (scheduling apps) | #9 | #4 |
| Uptime (90 days) | 98.16% | 100% |
| Incidents (90 days) | 7 | 0 |
| Partial / major outages | 3 | 0 |
| Avg time to resolve | 15h 44m | — |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Acuity Scheduling and Sign In Scheduling (formerly 10to8) differ
- Sign In Scheduling (formerly 10to8) reported no incidents in the last 90 days, while Acuity Scheduling reported 7.
- Acuity Scheduling had 3 partial or major outages, compared with 0 for Sign In Scheduling (formerly 10to8).
- Acuity Scheduling's longest outage on record lasted 3d (Sep 18, 2026); Sign In Scheduling (formerly 10to8)'s lasted 3h 39m (Jan 23, 2026).
90-day uptime
Acuity Scheduling
Sign In Scheduling (formerly 10to8)
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Acuity Scheduling incidents
- Degraded performanceOct 23, 2026 · resolved in 2h 16m
Acuity Scheduling / Custom Conversion Tracking integration maintenance
Affected: Acuity Scheduling
- InformationalOct 21, 2026 · resolved in <1m
- Partial outageSep 18, 2026 · resolved in 3d 22h
Acuity Scheduling Admin Mobile app crashing unexpectedly after iOS 27 update
Affected: Acuity Scheduling
- Partial outageSep 9, 2026 · resolved in <1m
Acuity Scheduling / Client Scheduling Page showing "SORRY" error
- Degraded performanceAug 20, 2026 · resolved in 17h 44m
Acuity Scheduling - Unable to Connect to Meta
Affected: Acuity Scheduling
- Degraded performanceAug 20, 2026 · resolved in 2h 4m
Acuity Scheduling / Google calendar sync delayed
Affected: Acuity Scheduling
Recent Sign In Scheduling (formerly 10to8) incidents
No incidents reported by Sign In Scheduling (formerly 10to8) in the last 90 days.
Full Sign In Scheduling (formerly 10to8) reliability report →
Other scheduling apps to consider
- Calendly · #1 · 100% uptime
- Doodle · #2 · 100% uptime
- SavvyCal · #3 · 100% uptime
- YouCanBookMe · #5 · 100% uptime
See the full most reliable appointment scheduling software ranking →