Employee Scheduling Software · reliability comparison
Sling vs When I Work: which is more reliable? (2026)
When I Work is more reliable than Sling, scoring 100.0 vs 94.5 out of 100. Over the last 90 days Sling reported 2 incidents and When I Work reported 0, with effective uptime of 99.97% and 100% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | Sling | When I Work |
|---|---|---|
| Reliability score | 94.5 | 100.0 |
| Rank (employee scheduling apps) | #8 | — |
| Uptime (90 days) | 99.97% | 100% |
| Incidents (90 days) | 2 | 0 |
| Partial / major outages | 0 | 0 |
| Avg time to resolve | 1h 53m | — |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Sling and When I Work differ
- When I Work reported no incidents in the last 90 days, while Sling reported 2.
90-day uptime
Sling
When I Work
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Sling incidents
- Degraded performanceOct 27, 2026 · resolved in 25m
Affected: Sling by Toast Scheduling
- Degraded performanceOct 14, 2026 · resolved in 3h 20m
10/14/2026 - Sling Latency Issues
Affected: Sling by Toast Scheduling
Recent When I Work incidents
No incidents reported by When I Work in the last 90 days.
Other employee scheduling apps to consider
- Buddy Punch · #1 · 100% uptime
- Connecteam · #2 · 100% uptime
- QuickBooks Time · #3 · 100% uptime
- Shiftboard · #4 · 100% uptime
See the full most reliable employee scheduling software ranking →