What does a 99.9% uptime SLA mean?
Short answer
The provider promises the service will be available 99.9% of the month, which allows about 43 minutes of downtime, and pays service credits if it fails.
Checked October 14, 2026. How we rank
In more detail
99.95% allows about 22 minutes, 99.99% about 4 minutes. Credits rarely cover your actual losses, so treat the SLA as a signal of engineering quality rather than insurance.