Summary
For 11 virtual servers (52 vCPU, 240 GB RAM, 10 TB of storage), running everything on-premises on VMware costs about $262k over five years, against about $400k for the same servers on Azure UAE North with 3-year reserved instances. Azure is cheaper only in the first two years; break-even comes at about month 25, and over five years on-premises costs about 35% less.
Our advice for this profile: core servers on-premises with a passive standby; AI workloads and offsite backup copies in Azure.
Cumulative cost, USD thousands
| Year | On-premises (cumulative) | Azure UAE North (cumulative) | Cheaper |
|---|---|---|---|
| Year 1 | $141.1k | $92.0k | Azure |
| Year 2 | $171.3k | $169.0k | Azure |
| Year 3 | $201.6k | $246.0k | On-premises |
| Year 4 | $231.8k | $323.0k | On-premises |
| Year 5 | $262.0k | $400.0k | On-premises |
The two designs compared
On-premises
One active VMware ESXi host runs every virtual machine. A passive host of the same size receives daily replicas and is started manually if the active host fails. A QNAP NAS keeps full offline, immutable backups (3-2-1). Licensing uses vSphere Standard (about $55 per core per year, the lowest-cost production edition; free ESXi is licensed for non-production use only), with Windows Server Datacenter and SQL Server Standard bought once for both hosts. Cost: about $141k in year 1, then about $30k a year.
Azure UAE North
The same 11 servers on Azure with 3-year reserved instances and new licences. Cost: about $92k in year 1, then about $77k a year.
What changes the answer
- Existing Microsoft licences with Software Assurance: on-premises $219k vs Azure $260k. On-premises still wins, by less.
- Only vSphere Foundation available (about $155 per core): on-premises rises to about $294k, still below Azure.
- Azure pay-as-you-go, no reservation: Azure rises to about $477k.
On-premises stays cheaper in every sensitivity case for this workload profile. Different profiles (variable workloads, short horizons, no in-house IT) can favour the cloud, which is why we model each case.
The trade-off to state plainly
Manual failover from daily replicas means recovery takes roughly an hour or more, and up to a day of data may need to be re-entered. Replicating every hour narrows that window at no extra licence cost. If your business needs near-zero downtime, budget for automatic clustering or a cloud-based recovery site.
Method and assumptions
Indicative list prices as of October 2026. Items common to both scenarios are excluded: Microsoft 365, firewalls, endpoint protection and switching. An AI layer adds about $955 per month in either case. All prices must be confirmed with vendors for your specific case.