Multi-Cloud Cost Comparison Calculator

For each provider: (instances × compute rate × hours × commitment factor + storage GB × storage price + egress GB × egress price) × (1 + support%). Each provider is costed on the same three meters — compute hours, stored gigabyte-months and egress gigabytes — then support is added as a percentage of the whole bill because that is how every major provider prices it. The commitment discount is applied only to compute, since storage and egress are rarely covered by reservations or savings plans.

Headline instance rates are within a few percent of each other, so the real differences come from egress, storage tiers and support, and a comparison that ignores those three usually picks the wrong provider. Treat this as a planning estimate: confirm every rate against your own agreement and the provider's pricing calculator before committing.

This calculator takes 15 inputs: Instances in the workload, Billed hours per month, AWS compute rate per instance, Azure compute rate per instance, Google Cloud compute rate per instance, Commitment discount applied to compute, Object and block storage, AWS storage price, Azure storage price, Google Cloud storage price, Internet egress per month, AWS egress price, Azure egress price, Google Cloud egress price, Enterprise support charge. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

Egress is the one meter that scales with your users rather than your architecture, and the per-GB rates differ far more between providers than compute does. A workload serving 100 TB a month can see a five-figure monthly swing on egress alone while compute stays level.