Fly.io SLA
99.9% uptime guarantee (Enterprise plan only)
Official SLA Commitment
Applies to
Enterprise plan only
Scope
Monthly uptime for Enterprise plan customers
Measurement
Actual Availability as a percentage of total time per calendar month, measured by Fly.io
Exclusions
Scheduled maintenance, force majeure, customer-caused issues, third-party provider failures
Not covered
Pay-as-you-go and standard support customers have no uptime SLA
Promised vs Measured
SLA Promise
99.9%
≤ 43m downtime/month
Measured (30d)
100.00%
≈ < 1m downtime this month
Verdict
Meeting SLA
24h Uptime
100.00%
7d Uptime
100.00%
30d Uptime
100.00%
Pricing & SLA by Tier
| Plan | SLA Guarantee | Price | Meeting 30d? |
|---|---|---|---|
| Pay-as-you-go | No uptime SLA | $0 (usage-based) | — |
| Standard Support | No uptime SLA | $29/mo add-on | — |
| Premium Support | No uptime SLA | $199/mo add-on | — |
| Enterprise | 99.9% | $2,500+/mo |
Source: fly.io.com/pricing
SLA Credit Policy
Enterprise customers receive service credits if monthly availability falls below 99.9%. Credits are calculated as monthly fees multiplied by credit percentage. Credits are not refundable and apply to future billing only.
| Monthly Uptime | Credit |
|---|---|
| 99.0% – 99.9% | 10% of monthly fee |
| 98.0% – 99.0% | 15% of monthly fee |
| 96.0% – 98.0% | 20% of monthly fee |
| < 96.0% | 30% of monthly fee |
Credits capped at 30% of monthly fee. Must be claimed within 30 days. Applied within 30 days of approval.
Industry SLA Tier Compliance
| Tier | Downtime Budget/Month | 24h | 7d | 30d |
|---|---|---|---|---|
| 99.9%(three nines)Fly.io's SLA | 43m 12s | |||
| 99.95% | 21m 36s | |||
| 99.99%(four nines) | 4m 19s | |||
| 99.999%(five nines) | 26s |
Equivalent Downtime
Last 24 hours
< 1m
Last 7 days
< 1m
Last 30 days
< 1m
Incident Summary (90 days)
Total Incidents
73
Active Now
0
Resolved
73
Avg. Resolution
2h 19m
Fly.io SLA: What You Need to Know
Fly.io guarantees 99.9% uptime measured as monthly uptime for enterprise plan customers. This commitment applies exclusively to Enterprise plan customers — other tiers have no contractual uptime guarantee.
Based on DevHelm's continuous monitoring, Fly.io currently shows a 30-day measured uptime of 100.00%. This meets their published SLA commitment of 99.9%.
What's Covered (and What Isn't)
Fly.io's SLA specifically covers monthly uptime for enterprise plan customers. It explicitly excludes: Pay-as-you-go and standard support customers have no uptime SLA. This means outages in excluded components don't count toward SLA credits.
Impact on Your Application
At 100.00% uptime, you can expect approximately < 1m of cumulative downtime per year from Fly.io alone. If your application depends on additional services, their independent failure probabilities compound — making dependency monitoring essential for maintaining your own SLA commitments.
Monitoring Methodology
DevHelm tracks Fly.io's official status page continuously and aggregates component-level status data into uptime percentages. Data is refreshed every 5 minutes. Uptime is calculated as the percentage of time all components report operational status.
