AWS vs Azure - Precos de instancias compute
AWS vs Azure — Compute Instance Pricing
AWS EC2 and Azure Virtual Machines are the two most widely used compute services, and choosing between them on preco alone can save your team thousands of dollars per month. This comparacao puts equivalent general-purpose instancia families side by side, using published list precos for the baseline US regiaos (us-east-1 for AWS, East US for Azure).
Equivalent General-Purpose Instances
The table below matches AWS m5 and m6i instancias with the Azure Dv4/Dv5 series by vCPU and memory. All precos are for Linux on-demand hourly rates.
| vCPU | RAM | AWS instance | AWS on-demand | Azure instance | Azure on-demand |
|---|---|---|---|---|---|
| 2 | 8 GiB | m5.large | $0.096 | D2s_v5 | $0.096 |
| 4 | 16 GiB | m5.xlarge | $0.192 | D4s_v5 | $0.192 |
| 8 | 32 GiB | m5.2xlarge | $0.384 | D8s_v5 | $0.384 |
| 16 | 64 GiB | m5.4xlarge | $0.768 | D16s_v5 | $0.768 |
On-demand pricing for these general-purpose families is effectively identical between AWS and Azure at the list level. The real custo difference appears when you apply reservation descontos.
1-Year Reserved Instance Pricing
| vCPU | RAM | AWS 1-yr RI (No Upfront) | Azure 1-yr RI |
|---|---|---|---|
| 2 | 8 GiB | $0.058 (-40%) | $0.057 (-41%) |
| 4 | 16 GiB | $0.115 (-40%) | $0.114 (-41%) |
| 8 | 32 GiB | $0.230 (-40%) | $0.228 (-41%) |
| 16 | 64 GiB | $0.460 (-40%) | $0.456 (-41%) |
Azure’s 1-year Reserved Instances come in fractionally cheaper for the equivalent size, but the difference is within 1 percent and rarely the deciding factor. The bigger lever is whether your carga de trabalho is steady-state enough to justify the commitment in the first place — see our reservada instancias guia for the strategy.
Spot / Preemptible Pricing
| vCPU | RAM | AWS Spot | Azure Spot VM |
|---|---|---|---|
| 2 | 8 GiB | ~$0.029 (-70%) | ~$0.025 (-74%) |
| 4 | 16 GiB | ~$0.058 (-70%) | ~$0.050 (-74%) |
Spot pricing fluctuates with supply, but Azure Spot VMs are consistently 10 to 15 percent cheaper than AWS Spot Instances for equivalent general-purpose sizes. If your carga de trabalho is interruptible — batch jobs, CI runners, stateless web tiers — Azure Spot can be the cheaper default. See our spot instancias guia for interruption-handling patterns.
Key Differences Beyond Price
- Billing granularity — AWS bills per second with a 60-second minimum; Azure bills per minute rounded up. For short-lived carga de trabalhos, the per-minute rounding can add 5 to 10 percent to the bill.
- B-series burstable — Azure’s
B-seriesis significantly cheaper than AWSt3for the same vCPU/RAM at low utilization, because Azure does not charge for CPU credits above the baseline. - Azure Hybrid Benefit — organizations with existing Windows Server or SQL Server licenses can reuse them on Azure for up to 85 percent off, a desconto AWS cannot match.
Verdict
For Linux general-purpose on-demand and reservada carga de trabalhos, AWS and Azure are within 1 percent of each other and the choice should be driven by team expertise and existing tooling. For Windows carga de trabalhos with existing licenses, Azure Hybrid Benefit typically wins. For interruptible carga de trabalhos, Azure Spot VMs are the cheaper default.