App Hosting Platforms · reliability comparison
Fly.io vs Vercel: which is more reliable? (2026)
Vercel is more reliable than Fly.io, scoring 66.8 vs 45.7 out of 100. Over the last 90 days Fly.io reported 53 incidents and Vercel reported 23, with effective uptime of 98.33% and 99.58% respectively. Vercel resolves incidents faster on average (1h 32m).
Data updated Nov 1, 2026 · How we score
| Metric | Fly.io | Vercel |
|---|---|---|
| Reliability score | 45.7 | 66.8 |
| Rank (app hosting platforms) | #10 | #9 |
| Uptime (90 days) | 98.33% | 99.58% |
| Incidents (90 days) | 53 | 23 |
| Partial / major outages | 19 | 9 |
| Avg time to resolve | 2h 34m | 1h 32m |
| Outages we detected | 0 | 0 |
| Transparency score | 100/100 | 100/100 |
Where Fly.io and Vercel differ
- Fly.io reported 2.3× as many incidents as Vercel over the last 90 days (53 vs 23).
- Fly.io had 19 partial or major outages, compared with 9 for Vercel.
- Vercel fixes problems faster: 1h 32m on average, against 2h 34m for Fly.io.
- Fly.io's longest outage on record lasted 18h 40m (Sep 23, 2026); Vercel's lasted 6h 36m (Oct 12, 2026).
90-day uptime
Fly.io
Vercel
- 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 Vercel incidents
- Degraded performanceOct 23, 2026 · resolved in 1h 2m
Delays in Logs and Observability data
Affected: Logs, Observability
- Partial outageOct 12, 2026 · resolved in 6h 36m
Increased build and deployment failures
Affected: Builds, Git Integrations
- Partial outageOct 10, 2026 · resolved in 1h 21m
Delays in Drains, Observability, and Workflow in Washington (iad1)
Affected: Drains, Logs, Observability, Queues, Workflow
- Partial outageOct 6, 2026 · resolved in 16m
Vercel Auth login failures for pages with Deployment Protection enabled
Affected: Routing Middleware
- Degraded performanceOct 6, 2026 · resolved in 25m
Elevated Sandbox error rates in Paris (cdg1)
Affected: Sandbox
- Degraded performanceSep 28, 2026 · resolved in 27m
Build failures and 500 errors for functions using Edge runtime
Affected: Builds
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