Intelligence Update
Cloud availability improved in 2025 — but worst cases worsen
An outage of a cloud data center does not necessarily cause an outage of a cloud application. Applications designed to operate across availability zones and cloud regions can continue to perform during outages. Indeed, cloud providers make it clear that customers should design their applications to account for occasional infrastructure failures (see Build resilient apps: do not rely solely on cloud infrastructure).
In 2025, Microsoft Azure, Google Cloud and Amazon Web Services (AWS) all continued to experience occasional zone and region outages. For customers who had not architected dual-zone or dual-region resiliency, applications hosted in affected locations likely experienced downtime. But some outages affected even those organizations that had diligently planned for failure. Google Cloud and Microsoft Azure both suffered from widespread, multi-region outages in 2025. In these cases, even if failover to another region had been planned, application downtime likely occurred.
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