This might be hard to believe, given Amazon Web Services’ three-hour outage last Tuesday: AWS is far better at keeping its public cloud service running than either Microsoft or Google.

Since the start of 2015, AWS has had a total of 448 minutes of downtime, 40% of which occurred in last week’s episode. That total compares with 1,652 minutes for its biggest rival, Microsoft, and 506 for Google. The figures were calculated by CloudHarmony, a unit of Gartner which tracks the performance of commercial cloud services. The above chart illustrates the total number of outages.