Cloud & DevOps · Topic cluster spoke
AWS vs Azure for enterprise migration
A practical comparison for CTOs choosing between AWS and Azure when planning large-scale cloud migration.
18 Aug 2026 · 8 min read
What is the difference between AWS and Azure for enterprise migration?
AWS and Azure both support large enterprise migrations, but AWS typically leads on breadth of cloud-native services while Azure often wins when organisations already run Microsoft identity, Windows Server, and SQL Server estates at scale.
Buyer committees rarely need another feature matrix. They need a placement rule: which workloads belong where, what skills you must hire, and what commercial commitments you are locking in for three years.
Use this comparison alongside our full Enterprise Cloud Migration Strategy guide when you are building the programme charter.
Decision criteria that matter
- Existing Microsoft licensing and Entra ID / Active Directory footprint.
- Internal skills: Terraform + AWS vs Bicep / Azure DevOps familiarity.
- Data gravity: warehouses, analytics, and AI services you already use.
- Regulatory and residency needs for UK and EU workloads.
- Partner ecosystem and support contracts already on the books.
AWS vs Azure for enterprise migration
| Decision factor | Lean AWS when… | Lean Azure when… |
|---|---|---|
| Identity | You want cloud-native IAM patterns | Hybrid Microsoft identity is the centre of gravity |
| Workloads | Containers, event-driven, multi-service estates | Windows, .NET, SQL Server, Microsoft 365 adjacency |
| Operations | Teams prefer AWS Control Tower style landing zones | Teams already live in Azure DevOps and Microsoft tooling |
| Commercial | Committed use discounts fit your growth curve | Enterprise Agreements heavily favour Microsoft cloud |
A practical placement rule
- Put Microsoft-heavy line-of-business systems on Azure first.
- Put greenfield cloud-native products on AWS when skills and services fit.
- Avoid dual-platform sprawl without a platform team and guardrails.
- Document exceptions; do not let every product team pick independently.
For the end-to-end programme view, return to the Enterprise Cloud Migration Strategy.
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