Cloud Migration Checklist for Australian Businesses: AWS Sydney vs Azure Australia East

Every Australian business planning a cloud migration eventually hits the same fork in the road: AWS's Sydney (ap-southeast-2) region, or Microsoft Azure's Australia East (New South Wales) and Australia Southeast (Victoria) regions. Both are mature, both keep data within Australian borders, and both are backed by IRAP-assessed services suitable for government and regulated workloads. The right answer depends less on brand preference and more on your existing stack, compliance obligations, and team skills.

Data Residency and Compliance: Where They're Actually Similar

Both AWS Sydney and Azure Australia East offer in-country data storage and processing, and both have services assessed under the Infosec Registered Assessors Program (IRAP) at PROTECTED level, which matters if you're selling to Australian government or handling data under frameworks that reference IRAP. Neither platform automatically makes you compliant with the Privacy Act, APRA CPS 234, or any other framework — you still need to configure services correctly, and residency alone doesn't satisfy every obligation under APP 8 if you use global services or support functions outside Australia.

• Confirm which specific services you plan to use are available and IRAP-assessed in the Australian region — not every service ships to every region on day one.
• Check whether your chosen services replicate data or logs to a global control plane outside Australia by default (both platforms have services that do this unless configured otherwise).
• Map data residency requirements per data type — customer PII may need stricter handling than application telemetry.

Cost Structure: Where the Real Differences Show Up

List pricing between AWS Sydney and Azure Australia East is close enough that it rarely decides the migration on its own. The bigger cost drivers are egress pricing for data leaving the region, reserved instance/savings plan structures, and — critically — whether your organisation already has negotiated Microsoft Enterprise Agreement credits that make Azure effectively discounted before you've compared a single instance price.

• If you're already a heavy Microsoft 365 / Dynamics 365 shop with an Enterprise Agreement, Azure often has a genuine cost and integration advantage.
• If your engineering team already has deep AWS experience, the migration and ongoing operational cost is usually lower on AWS, even if list pricing is a wash.
• Model egress costs explicitly — multi-region architectures and hybrid on-prem/cloud setups can make data transfer a larger line item than compute.

A Practical Pre-Migration Checklist

• Inventory current workloads, dependencies, and data classifications before choosing a target platform.
• Confirm regional service availability and IRAP status for every service your architecture depends on.
• Model total cost of ownership over 3 years, including egress, support tiers, and reserved capacity — not just sticker compute price.
• Assess your team's existing cloud skills; retraining cost is real and often underestimated in migration business cases.
• Choose a migration pattern per workload: rehost (lift-and-shift), replatform, or refactor — don't default to one approach for everything.
• Plan a pilot migration for a non-critical workload before committing production systems.
• Define rollback criteria and a go/no-go checkpoint before cutting over anything customer-facing.

AWS Sydney: Where It Tends to Win

AWS's breadth of managed services, maturity of its container and Kubernetes tooling (EKS), and the sheer size of its partner and talent ecosystem in Australia make it a strong default for cloud-native and startup workloads, particularly where the team is building new, not just migrating old.

Azure Australia East: Where It Tends to Win

Azure's tight integration with Microsoft 365, Dynamics 365, and Active Directory / Entra ID makes it the pragmatic choice for enterprises whose identity, ERP, and productivity stack is already Microsoft-centric — migrating there often means fewer new integration points, not more.

“Most 'AWS vs Azure' debates in Australia are really a proxy for a different question: what does your existing stack, your team's skills, and your compliance obligations already point towards? Get that answer right and the platform choice becomes obvious.”

— Priya Sharma, CTO, Alliance Corporation