AWS and Azure together hold roughly 55% of the global cloud market in 2026 — AWS at ~32%, Azure at ~23%. The gap has narrowed, not because AWS weakened, but because Azure's Microsoft integration unlocked genuine value for the enterprise cohort that runs Windows workloads. If your stack is Linux-first and cloud-native, the answer is usually AWS. If you have a Microsoft estate, Azure deserves a real evaluation.
What changed in 2026
- Azure OpenAI Service matured — GPT-4o, o1, and the new o3-class models are available through Azure's managed endpoint with VNet integration, making it the default for enterprises that need OpenAI models inside a compliance boundary.
- AWS Bedrock added Anthropic Claude 3.7 and Amazon Nova — the model catalogue gap vs Azure OpenAI narrowed, but the compliance and audit tooling depth differs.
- Azure Arc expanded — on-premises and multi-cloud resource management is now more coherent, which matters for large enterprises with hybrid mandates.
- AWS Control Tower added account-factory improvements — multi-account governance at scale is faster to bootstrap than it was in 2024.
- Both clouds improved their FinOps tooling — Azure Cost Management and AWS Cost Explorer are both competent; third-party tools like CloudHealth are less essential.
Core service comparison
| Capability |
AWS |
Azure |
| Compute (VM) |
EC2 |
Virtual Machines |
| Managed Kubernetes |
EKS |
AKS |
| Serverless functions |
Lambda |
Azure Functions |
| Object storage |
S3 |
Blob Storage |
| Data warehouse |
Redshift |
Synapse Analytics |
| Managed SQL Server |
RDS for SQL Server |
SQL Managed Instance (deeper integration) |
| Identity / directory |
IAM + Cognito |
Entra ID (formerly Azure AD) |
| AI / LLM gateway |
Bedrock (multi-model) |
Azure OpenAI Service (GPT-centric) |
| CDN |
CloudFront |
Azure Front Door |
| Hybrid connectivity |
Direct Connect |
ExpressRoute |
Pricing leverage: where each cloud wins
AWS savings levers:
- Savings Plans (compute or EC2-specific): 30–60% off on-demand
- Spot Instances: 60–80% off for fault-tolerant workloads
- Reserved Instances for databases (RDS): 40–60% off
Azure savings levers:
- Azure Hybrid Benefit: 40–50% off VM cost if you bring existing Windows Server licences
- Reserved VM Instances (1 or 3 year): 30–55% off
- Dev/Test pricing through Visual Studio subscriptions: 50%+ off for non-production
Example: SQL Server workload, 4-core Windows VM, 3-year commitment
AWS EC2 (m6i.xlarge, Windows, Reserved 3yr): ~$420/mo
Azure (D4s_v5, Hybrid Benefit + Reserved 3yr): ~$220/mo
Without existing Windows licences, Azure cost rises to ~$390/mo — near parity.
Identity and access management
This is where Azure has a structural advantage for enterprise:
# Azure: Entra ID group maps directly to resource role
az role assignment create \
--assignee-object-id <group-object-id> \
--role "Contributor" \
--scope /subscriptions/<sub-id>/resourceGroups/my-rg
# AWS: IAM role assumes require either Cognito, SSO, or federation setup
aws iam create-role --role-name MyRole \
--assume-role-policy-document file://trust-policy.json
If your organisation already uses Entra ID for laptop logins and M365, Azure's RBAC integration removes a whole identity-federation project. On AWS you'd need AWS IAM Identity Center (formerly SSO) plus SAML federation.
How to pick
- Heavy Windows Server and SQL Server footprint? → Azure. Hybrid Benefit alone often pays for the migration.
- Linux-first, cloud-native microservices? → AWS. Wider service catalogue, larger DevOps ecosystem.
- Need GPT-class models inside a VNet compliance boundary? → Azure OpenAI Service.
- Need multi-model AI with the broadest choice? → AWS Bedrock.
- M365 and Teams are your collaboration layer? → Azure for tighter integration.
- Kubernetes-primary with no Microsoft estate? → AWS EKS or GCP GKE. AKS is solid but the ecosystem tilts AWS.
Common mistakes
Assuming Azure is automatically cheaper. It is, but only with Hybrid Benefit and licensing transfers in place. Greenfield Azure without those discounts is often more expensive than AWS.
Underestimating Azure networking complexity. VNets, subnets, NSGs, peering, and Private Endpoints have more moving parts than AWS VPCs for equivalent configurations.
Using AWS for a .NET 8 enterprise app with no Linux migration path. Azure App Service + Entra ID + SQL Managed Instance is a better-integrated stack for this scenario.
Mixing Entra ID tenants. Multi-tenant Azure deployments require careful B2B federation; getting it wrong breaks access silently.
What to skip
- Azure Stack HCI unless you have a specific on-premises sovereign-data requirement; the management overhead is high.
- AWS CodeCommit — it is feature-frozen and being deprecated in favour of third-party Git integrations. Use GitHub or GitLab regardless of cloud.
- Lift-and-shift of on-prem VM fleets without right-sizing — both clouds will happily run your oversized VMs at full price. Use Azure Migrate or AWS Application Migration Service with sizing recommendations first.
FAQ
Is Azure easier for .NET developers?
Yes, meaningfully so. Azure App Service deployment from Visual Studio or GitHub Actions is one-click; Entra ID auth integration with ASP.NET Core is nearly zero-config.
Which cloud has better Kubernetes support?
AWS EKS and Azure AKS are both production-grade. EKS has a wider add-on ecosystem; AKS has tighter Azure Monitor and Entra ID integration. GKE still leads both on managed-node simplicity.
Can I run workloads on both to avoid vendor lock-in?
You can, but dual operations doubles your cloud engineering overhead. Multi-region on one cloud is almost always a better trade-off for availability.
Which wins for startups with no Microsoft licensing?
AWS, by a wide margin. The ecosystem, tooling, and hiring pool advantage is decisive when Hybrid Benefit is not in play.
Where to go next