Appointment Scheduling Software · reliability comparison
Acuity Scheduling vs OnceHub: which is more reliable? (2026)
OnceHub is more reliable than Acuity Scheduling, scoring 74.8 vs 45.5 out of 100. Over the last 90 days Acuity Scheduling reported 7 incidents and OnceHub reported 2, with effective uptime of 98.16% and 99.67% respectively. OnceHub resolves incidents faster on average (7h 8m).
Data updated Nov 1, 2026 · How we score
| Metric | Acuity Scheduling | OnceHub |
|---|---|---|
| Reliability score | 45.5 | 74.8 |
| Rank (scheduling apps) | #10 | #7 |
| Uptime (90 days) | 98.16% | 99.67% |
| Incidents (90 days) | 7 | 2 |
| Partial / major outages | 3 | 2 |
| Avg time to resolve | 15h 44m | 7h 8m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Acuity Scheduling and OnceHub differ
- Acuity Scheduling reported 3.5× as many incidents as OnceHub over the last 90 days (7 vs 2).
- Acuity Scheduling had 3 partial or major outages, compared with 2 for OnceHub.
- OnceHub fixes problems faster: 7h 8m on average, against 15h 44m for Acuity Scheduling (2.2× quicker).
- Acuity Scheduling's longest outage on record lasted 3d (Sep 18, 2026); OnceHub's lasted 2d 15h (Jun 3, 2026).
90-day uptime
Acuity Scheduling
OnceHub
- 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 updateofficial 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 OnceHub incidents
- Partial outageSep 8, 2026 · resolved in 13h 25m
Ongoing maintenance with one of our service providers is causing delays in the delivery of SMS two-factor authentication (2FA) codes, which official update ↗
Affected: User Application
- Partial outageAug 26, 2026 · resolved in 50m
We have identified an issue related to signing in using Microsoft or Google.
Affected: User Application
Other scheduling apps to consider
- Calendly · #1 · 100% uptime
- Doodle · #2 · 100% uptime
- SavvyCal · #3 · 100% uptime
- Sign In Scheduling (formerly 10to8) · #4 · 100% uptime
See the full most reliable appointment scheduling software ranking →