Restaurant POS · reliability comparison
SkyTab (Shift4) vs SumUp: which is more reliable? (2026)
SumUp is more reliable than SkyTab (Shift4), scoring 54.2 vs 35.1 out of 100. Over the last 90 days SkyTab (Shift4) reported 14 incidents and SumUp reported 5, with effective uptime of 97.40% and 98.98% respectively. SkyTab (Shift4) resolves incidents faster on average (14h 41m).
Data updated Nov 2, 2026 · How we score
| Metric | SkyTab (Shift4) | SumUp |
|---|---|---|
| Reliability score | 35.1 | 54.2 |
| Rank (restaurant POS systems) | #15 | #10 |
| Uptime (90 days) | 97.40% | 98.98% |
| Incidents (90 days) | 14 | 5 |
| Partial / major outages | 6 | 1 |
| Avg time to resolve | 14h 41m | 19h 59m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where SkyTab (Shift4) and SumUp differ
- SkyTab (Shift4) reported 2.8× as many incidents as SumUp over the last 90 days (14 vs 5).
- SkyTab (Shift4) had 6 partial or major outages, compared with 1 for SumUp.
- SkyTab (Shift4) fixes problems faster: 14h 41m on average, against 19h 59m for SumUp.
- SkyTab (Shift4)'s longest outage on record lasted 3d (Oct 25, 2026); SumUp's lasted 3h 2m (Jun 27, 2026).
90-day uptime
SkyTab (Shift4)
SumUp
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent SkyTab (Shift4) incidents
- Partial outageNov 1, 2026 · resolved in 1h 33m
Tip Adjustments Issue Due To Daylight Savings
Affected: Shift4 Dine POS - US, Shift4 Dine POS - Canada, Shift4 Dine Mobile, Shift4 Dine Online Ordering, Shift4 Dine Kiosk
- MaintenanceOct 31, 2026 · ongoing
Affected: Givex POS, Shift4 Gift Cards
- Major outageOct 28, 2026 · resolved in 3h 4m
Eigen Sim Cards Connection Issues for Canadian Merchants - Oct 28 2026.official update ↗
Affected: Telus Cellular Service
- Partial outageOct 25, 2026 · resolved in 3d 4h
Shift4 One & Duoofficial update ↗
Affected: Shift4 One
- Degraded performanceOct 22, 2026 · resolved in 7d 4h
Affected: Merchant Funding USA, Card Processing
- Degraded performanceOct 22, 2026 · resolved in 1h 29m
Timeouts for US processing 10/22/26
Affected: TSYS, Shift4 Dine POS - US, eCommerce, Shift4 One, Shift4 Venue Payments (US)
Recent SumUp incidents
- Degraded performanceOct 29, 2026 · ongoing
- MaintenanceOct 9, 2026 · ongoing
SEPA instant payments will be delayed due to a scheduled maintenance
Affected: Business Account (EU)
- Degraded performanceSep 5, 2026 · resolved in 7h 6m
Multi-Device-Sync and Kitchen Display System (KDS) are not receiving orders
Affected: Kitchen Display System (KDS), Ordering & Floor Plan
- Degraded performanceSep 3, 2026 · resolved in 6d 2h
Touchscreen not responding on POS devices
Affected: POS Pro, SumUp POS
- Degraded performanceAug 17, 2026 · resolved in 10m
Issue with Logins and Payments Acceptance
Affected: Tap to Pay on Android, Solo Cloud API, Online Payments, Payouts, Card Readers: Solo, Card Readers: Air & 3G +7 more
- MaintenanceAug 15, 2026 · ongoing
Transactions processing delay in UK
Affected: Business Account (EU)
Other restaurant POS systems to consider
- Shopify POS · #1 · 100% uptime
- SpotOn · #2 · 100% uptime
- Loyverse · #3 · 99.91% uptime
- Clover · #4 · 99.88% uptime