App Hosting Platforms · reliability comparison
Azure App Service vs Fly.io: which is more reliable? (2026)
Azure App Service is more reliable than Fly.io, scoring 100.0 vs 32.4 out of 100. Over the last 90 days Azure App Service reported 0 incidents and Fly.io reported 54, with effective uptime of 100% and 98.34% respectively.
Data updated Nov 2, 2026 · How we score
| Metric | Azure App Service | Fly.io |
|---|---|---|
| Reliability score | 100.0 | 32.4 |
| Rank (app hosting platforms) | — | #10 |
| Uptime (90 days) | 100% | 98.34% |
| Incidents (90 days) | 0 | 54 |
| Partial / major outages | 0 | 20 |
| Avg time to resolve | — | 2h 21m |
| Outages we detected | 0 | 0 |
| Transparency score | Collecting data | Collecting data |
Where Azure App Service and Fly.io differ
- Azure App Service reported no incidents in the last 90 days, while Fly.io reported 54.
- Fly.io had 20 partial or major outages, compared with 0 for Azure App Service.
90-day uptime
Azure App Service
Fly.io
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Azure App Service incidents
No incidents reported by Azure App Service in the last 90 days.
Recent Fly.io incidents
- Degraded performanceNov 2, 2026 · resolved in 1h 1m
Elevated Machine start failures in ARN
Affected: Machines API
- Partial outageNov 2, 2026 · resolved in 38m
Affected: IAD - Ashburn, Virginia (US)
- Degraded performanceNov 1, 2026 · resolved in 2h 10m
Outbound IPv4 connectivity failures in ARN, JNB, and GRU
Affected: GRU - Sao Paulo, Brazil, ARN - Stockholm, Sweden, JNB - Johannesburg, South Africa
- Degraded performanceOct 30, 2026 · resolved in 1h 28m
Slow image pulls delaying Machine starts in IAD
Affected: Deployments, IAD - Ashburn, Virginia (US)
- InformationalOct 29, 2026 · resolved in <1m
- Degraded performanceOct 29, 2026 · resolved in 48m
Elevated issues with the Machines API
Affected: Machines API, Dashboard, Customer Applications
Other app hosting platforms to consider
- DigitalOcean App Platform · #1 · 99.98% uptime
- Heroku · #2 · 99.95% uptime
- Northflank · #3 · 99.90% uptime
- Koyeb · #4 · 99.64% uptime