Cloud Storage & Office Suites · reliability comparison
Proton Drive vs SugarSync: which is more reliable? (2026)
SugarSync is more reliable than Proton Drive, scoring 99.2 vs 77.0 out of 100. Over the last 90 days Proton Drive reported 3 incidents and SugarSync reported 2, with effective uptime of 99.65% and 100% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | Proton Drive | SugarSync |
|---|---|---|
| Reliability score | 77.0 | 99.2 |
| Rank (cloud storage & office suites) | #7 | #2 |
| Uptime (90 days) | 99.65% | 100% |
| Incidents (90 days) | 3 | 2 |
| Partial / major outages | 3 | 0 |
| Avg time to resolve | 3h 11m | — |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Proton Drive and SugarSync differ
- Proton Drive reported 50% more incidents than SugarSync over the last 90 days (3 vs 2).
- Proton Drive had 3 partial or major outages, compared with 0 for SugarSync.
- Proton Drive's longest outage on record lasted 4h 27m (Jan 16, 2026); SugarSync's lasted 1d 13h (Apr 12, 2026).
90-day uptime
Proton Drive
SugarSync
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Proton Drive incidents
- Major outageOct 2, 2026 · resolved in 3h 17m
MacOS Certification Errors on the Proton Meet & Proton Mail appsofficial update ↗
Affected: Mobile and Desktop Apps, Desktop Apps
- Partial outageSep 1, 2026 · resolved in 4h 8m
Service disruptionofficial update ↗
Affected: Web Application, Free servers, Mobile Apps, Web Application, Mobile Apps, Web Application +20 more
- Major outageAug 26, 2026 · resolved in 2h 9m
Global Outageofficial update ↗
Affected: Web Application, Free servers, Mobile Apps, Web Application, Mobile Apps, Incoming Mail +18 more
Recent SugarSync incidents
- InformationalSep 8, 2026 · resolved in 2d 6h
Affected: Web Application, Desktop Application, Mobile Applications
- InformationalAug 26, 2026 · resolved in 1h 2m
Support limited due to network maintenance
Affected: Ticketing/Email, Telephone
Other cloud storage & office suites to consider
- Tresorit · #1 · 100% uptime
- ShareFile · #3 · 99.99% uptime
- Egnyte · #4 · 99.94% uptime
- Dropbox · #5 · 99.88% uptime
See the full most reliable cloud storage & office suites ranking →