Service comparison

Vercel vs. Fly.io

Vercel vs. Fly.io — reliability, API availability, and incident frequency head-to-head.

Last 90 days · 92 incidents total · Data via Pulsetic monitoring

Head-to-head

90-day summary

Vercel

vercel.com

Online
- 90-day uptime
  
  96.91%
- Incidents (90d)
  
  31
  
  10 major · 21 minor
- Median resolution
  
  1h 2m
- Longest outage
  
  22h 48m
View status page →
Fly.io

fly.io

Online
- 90-day uptime
  
  91.27%
- Incidents (90d)
  
  61
  
  24 major · 37 minor
- Median resolution
  
  1h 37m
- Longest outage
  
  45h 16m
View status page →

Uptime over time

Availability across windows

Window	Vercel	Fly.io	Δ
Last 24 hours	100.00%	100.00%	0.00 pp
Last 7 days	99.42%	94.88%	+4.54 pp
Last 30 days	98.42%	94.24%	+4.18 pp
Last 90 days	96.91%	91.27%	+5.64 pp

Δ is percentage-point difference (Vercel minus Fly.io). Higher is better.

Incidents 90-day

Severity breakdown

Vercel

31 total

10 major 21 minor
- Median resolution
  
  1h 2m
- Longest outage
  
  22h 48m
Fly.io

61 total

24 major 37 minor
- Median resolution
  
  1h 37m
- Longest outage
  
  45h 16m

Recent activity

Last 5 incidents, side-by-side

Vercel
- Aug 20
  
  New container functions are failing
  
  47m
  
  Major
- Aug 20
  
  Logs unavailable to query in Dashboard
  
  11m
  
  Major
- Aug 18
  
  Elevated errors for Workflow streams
  
  < 1m
  
  Minor
- Aug 17
  
  Partial disruption of Observability, Analytics, Firewall, Usage, and Login in Dashboard
  
  6h 54m
  
  Minor
- Aug 14
  
  Dynamic API routes returned 404 errors for some deployments
  
  < 1m
  
  Minor
View all incidents →
Fly.io
- Aug 24
  
  Metrics in some regions are lagging behind
  
  3h 1m
  
  Minor
- Aug 23
  
  Network Issues in LAX Region
  
  41m
  
  Major
- Aug 20
  
  Temporary DNS resolution failure
  
  < 1m
  
  Minor
- Aug 20
  
  Oauth/Macaroon Errors from flyctl
  
  22m
  
  Minor
- Aug 20
  
  MPG (v1) partially down in ORD
  
  32m
  
  Major
View all incidents →

Bottom line

Vercel wins

Vercel edges out on 90-day uptime.

Vercel posted 96.91% vs. 91.27% for Fly.io (Δ +5.64 pp). Incidents: 31 vs. 61 (-30).

Also compare

Other Vercel comparisons

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