App Hosting Platforms · reliability comparison
Fly.io vs Upsun (Platform.sh): which is more reliable? (2026)
Fly.io is more reliable than Upsun (Platform.sh), scoring 45.7 vs 33.1 out of 100. Over the last 90 days Fly.io reported 53 incidents and Upsun (Platform.sh) reported 7, with effective uptime of 98.33% and 95.58% respectively. Fly.io resolves incidents faster on average (2h 34m).
Data updated Nov 1, 2026 · How we score
VS
| Metric | Fly.io | Upsun (Platform.sh) |
|---|---|---|
| Reliability score | 45.7 | 33.1 |
| Rank (app hosting platforms) | #10 | #12 |
| Uptime (90 days) | 98.33% | 95.58% |
| Incidents (90 days) | 53 | 7 |
| Partial / major outages | 19 | 5 |
| Avg time to resolve | 2h 34m | 1d 12h |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Fly.io and Upsun (Platform.sh) differ
- Fly.io reported 7.6× as many incidents as Upsun (Platform.sh) over the last 90 days (53 vs 7).
- Fly.io had 19 partial or major outages, compared with 5 for Upsun (Platform.sh).
- Fly.io fixes problems faster: 2h 34m on average, against 1d 12h for Upsun (Platform.sh) (14.1× quicker).
- Fly.io's longest outage on record lasted 18h 40m (Sep 23, 2026); Upsun (Platform.sh)'s lasted 3d (Sep 11, 2026).
90-day uptime
Fly.io
Upsun (Platform.sh)
- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Recent Fly.io incidents
- Degraded performanceNov 1, 2026 · resolved in 2h 10m
Outbound IPv4 connectivity failures in ARN, JNB, and GRU
Affected: JNB - Johannesburg, South Africa, GRU - Sao Paulo, Brazil, ARN - Stockholm, Sweden
- Degraded performanceOct 30, 2026 · resolved in 1h 28m
Slow image pulls delaying Machine starts in IAD
Affected: IAD - Ashburn, Virginia (US), Deployments
- 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
- InformationalOct 29, 2026 · resolved in 4h 48m
- InformationalOct 26, 2026 · resolved in 6h 6m
Recent Upsun (Platform.sh) incidents
- Partial outageOct 30, 2026 · resolved in 2h 41m
- Degraded performanceOct 21, 2026 · resolved in 3d 16h
- Partial outageSep 11, 2026 · resolved in 3d 1h
- Partial outageSep 4, 2026 · resolved in 3d 2h
- Partial outageSep 2, 2026 · resolved in 11h 28m
- Partial outageAug 26, 2026 · resolved in 10h 31m
Other app hosting platforms to consider
- DigitalOcean App Platform · #1 · 99.98% uptime
- Heroku · #2 · 99.95% uptime
- Koyeb · #3 · 99.64% uptime
- Render · #4 · 99.71% uptime