Cloud Storage & Office Suites · reliability comparison
Microsoft 365 vs Proton Drive: which is more reliable? (2026)
Microsoft 365 is more reliable than Proton Drive, scoring 100.0 vs 77.0 out of 100. Over the last 90 days Microsoft 365 reported 0 incidents and Proton Drive reported 3, with effective uptime of 100% and 99.65% respectively.
Data updated Nov 1, 2026 · How we score
| Metric | Microsoft 365 | Proton Drive |
|---|---|---|
| Reliability score | 100.0 | 77.0 |
| Rank (cloud storage & office suites) | — | #7 |
| Uptime (90 days) | 100% | 99.65% |
| Incidents (90 days) | 0 | 3 |
| Partial / major outages | 0 | 3 |
| Avg time to resolve | — | 3h 11m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Microsoft 365 and Proton Drive differ
- Microsoft 365 reported no incidents in the last 90 days, while Proton Drive reported 3.
- Proton Drive had 3 partial or major outages, compared with 0 for Microsoft 365.
90-day uptime
Microsoft 365
Proton Drive
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Microsoft 365 incidents
No incidents reported by Microsoft 365 in the last 90 days.
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
Other cloud storage & office suites to consider
- Tresorit · #1 · 100% uptime
- SugarSync · #2 · 100% uptime
- ShareFile · #3 · 99.99% uptime
- Egnyte · #4 · 99.94% uptime
See the full most reliable cloud storage & office suites ranking →