Cloud Hosting for Business: AWS vs Azure

What AWS Offers for Business Infrastructure

AWS is a hyperscale cloud platform built for enterprises that need a broad range of managed services. It is not a simple hosting provider. AWS is a collection of infrastructure and platform services that you compose into an architecture. EC2, S3, RDS, Lambda, CloudFront, and Route 53 each operate independently with their own pricing models, configuration interfaces, and operational characteristics.

The strength of AWS lies in its breadth. A business running multi-region applications with complex compliance requirements will find AWS has most of the services needed out of the box. The weakness is that pricing can be difficult to predict without careful calculation, and the interface complexity requires someone with AWS experience to operate it safely.

EC2 instances form the compute layer. On-demand instances are priced per hour. Reserved instances offer a discount for a one or three year commitment. Spot instances are cheaper but can be terminated by AWS with little notice, making them suitable for batch processing rather than services that need to stay running.

A common production setup on AWS uses an Application Load Balancer routing traffic to EC2 instances in an Auto Scaling Group across multiple Availability Zones, RDS for the database layer, ElastiCache for session management and caching, CloudFront for static assets, and S3 for object storage. This is a solid production architecture, but it comes with significant cost. A full production stack like this typically starts at several hundred pounds per month at moderate scale.

aws ec2 run-instances \
  --image-id ami-0abcdef1234567890 \
  --instance-type t3.medium \
  --key-name my-key-pair \
  --subnet-id subnet-01234567890abcdef \
  --security-group-ids sg-0123456789abcdef0 \
  --count 1

AWS charges for data transfer out of the platform, for load balancers per hour and per request, for RDS per hour, and for CloudFront per GB transferred. Each line item looks manageable in isolation until you multiply by actual usage. At scale, AWS can become cost-effective because per-unit pricing drops significantly at volume. Below that scale, you may be paying a premium for flexibility you are not using.

What Azure Offers for Business Infrastructure

Azure is Microsoft's cloud platform and integrates tightly with Windows Server environments, Active Directory, Microsoft 365, and enterprise software that runs on Microsoft stacks. If your business relies on SharePoint, Dynamics, Teams integrations, or Windows-based applications, Azure reduces the friction of connecting cloud infrastructure to existing systems.

Azure Virtual Machines function similarly to AWS EC2. Azure Blob Storage parallels AWS S3 for object storage. Azure SQL Database provides a managed relational database service comparable to AWS RDS. Azure Kubernetes Service (AKS) offers managed Kubernetes without the complexity of self-hosting the control plane.

The Azure Portal interface has improved significantly over the years, though it remains complex. Azure Active Directory (now Entra ID) is a strong identity and access management solution that many enterprises prefer over AWS IAM for its integration with Microsoft ecosystems.

az vm create \
  --resource-group myResourceGroup \
  --name myVM \
  --image UbuntuLTS \
  --admin-username azureuser \
  --generate-ssh-keys

Azure pricing follows a similar pattern to AWS, with on-demand instances, reserved pricing for longer commitments, and spot instances for fault-tolerant workloads. Azure Hybrid Benefit allows businesses with existing Windows Server licenses to use those licenses on Azure VMs, potentially reducing costs significantly for Windows-heavy environments.

The shared responsibility model in Azure works similarly to AWS. Microsoft manages the underlying infrastructure, and you manage the operating system, applications, and data. Understanding this division matters because it defines what Microsoft maintains and what your team is responsible for.

How Costs Compare for UK-Based Businesses

Direct cost comparisons between AWS and Azure are challenging because pricing varies by region, instance type, and usage patterns. However, some general observations help frame the decision for UK-based businesses.

For a small production web application — one application server, one database server, managed backups, and SSL — comparable setups on both platforms typically fall within similar ranges. Entry-level virtual machines on AWS and Azure start around GBP 20 to 40 per month for basic instances. Managed databases add GBP 30 to 80 per month depending on specifications. Load balancers and data transfer costs add further line items that can be difficult to estimate without running the numbers.

For a self-hosted Kubernetes cluster, costs increase considerably on both platforms. Three control plane nodes and three worker nodes on AWS EKS or Azure AKS typically run GBP 200 to 400 per month before accounting for the virtual machines themselves. The managed Kubernetes service simplifies operations significantly but adds a layer of cost on top of compute.

The break-even point where managed services justify their premium varies by workload. If your team spends significant time managing infrastructure that a managed service would handle, the operational savings can offset the additional cost. If your team rarely touches the infrastructure, paying for management layers may not make sense.

For businesses evaluating platform decisions more broadly, a review of your current web platform and infrastructure setup often reveals where costs can be optimised without sacrificing reliability.

Operational Complexity and the Skills Your Team Needs

AWS and Azure both require significant operational knowledge to use safely. The permission models in both platforms — AWS IAM and Azure Role-Based Access Control — are full disciplines on their own. Security groups, network configuration, and the shared responsibility model require training to navigate correctly.

Misconfigured security groups on publicly accessible services remain a common vulnerability across both platforms. An exposed database port or an overly permissive firewall rule can lead to compromise regardless of which cloud provider you use. Proper network design, least-privilege access principles, and regular security reviews matter more than the specific provider you choose.

If your team has existing experience with one platform, that knowledge transfers partially to the other. Concepts like virtual machines, managed databases, object storage, and load balancers exist in both environments. However, the specific configuration interfaces, CLI commands, and service naming differ enough that experience with AWS does not immediately translate to Azure proficiency and vice versa.

Businesses that lack internal cloud expertise may find that an IT support contract helps cover the operational gap while building internal knowledge over time.

Global Infrastructure and UK Performance

AWS operates data centres in London and Dublin for UK businesses. Azure operates data centres in the UK, with London and Cardiff as primary regions. Both platforms offer low-latency access from UK locations, which matters for applications where response time affects user experience.

AWS has a broader global footprint with more regions worldwide than Azure. If your business needs to serve users across multiple continents with infrastructure close to each user population, AWS may offer more options. Azure has strong presence in Europe and North America but fewer regions in Asia-Pacific and other areas.

For most UK-based businesses serving primarily UK and European customers, both platforms offer adequate infrastructure with comparable performance characteristics. The choice between them rarely comes down to geographic coverage at this scale.

Compliance Certifications That Matter for UK Businesses

Both AWS and Azure maintain extensive compliance certifications that UK businesses may need for regulatory purposes. ISO 27001, SOC 2, and GDPR compliance frameworks are covered by both platforms. Healthcare businesses needing HIPAA compliance and financial services businesses needing PCI DSS compliance can find compliant infrastructure on either platform.

AWS has achieved more certifications across more regions over a longer period. Azure benefits from its existing enterprise relationships and Microsoft compliance frameworks that align with government and financial sector requirements in the UK.

If your business has specific compliance requirements that mandate particular certifications, verify that your chosen platform can meet them before committing. Compliance requirements affect architecture decisions, data storage locations, and access controls in ways that are difficult to retrofit. A cybersecurity review of your web application architecture can help identify compliance gaps before they become problems.

Support Plans and Response Times

AWS offers tiered support plans. Basic support is free and provides access to documentation and community forums. Developer Support starts at around USD 29 per month with 12-hour response during business hours for urgent problems. Business Support starts at USD 100 per month with one-hour response for critical issues and access to AWS re:Post where AWS engineers answer technical questions. Enterprise Support begins at USD 15,000 per month and includes dedicated technical account management.

Azure offers similar support tiers through Microsoft Azure Support plans. Developer, Professional Direct, Premier, and Unified support tiers provide escalating response times and access to technical account managers at the higher tiers. Azure Expert Managed Services Providers offer additional support options for businesses wanting hands-on assistance with architecture and operations.

The level of support you need depends on your internal capabilities. A team with strong cloud engineering skills may only need basic support for documentation lookup. A team new to cloud infrastructure may benefit from faster response times and architectural guidance available at higher support tiers.

Understanding what support actually covers helps you set realistic expectations. Both platforms define response times based on the severity of the issue, and not every problem qualifies as critical regardless of how urgent it feels to your business.

Scenarios Where AWS Makes More Sense

AWS makes sense when your business needs compliance certifications that AWS holds and Azure does not, when you require managed services that only AWS provides, when your team has existing AWS certifications and experience, when you are running a large multi-service architecture where managed services offset operational complexity, or when you need global infrastructure with points of presence across many regions.

AWS also makes sense for businesses that have outgrown simpler hosting solutions and need the scalability to handle significant traffic growth without re-architecture. The auto-scaling capabilities, managed databases, and content delivery integration work together to handle variable loads without manual intervention.

If your application architecture involves complex API integrations, the approach to API design for business applications can affect which platform services fit best.

Scenarios Where Azure Makes More Sense

Azure is the stronger choice when your business relies heavily on Microsoft products including Windows Server, SQL Server, SharePoint, Teams, or Dynamics. The integration benefits between these products and Azure infrastructure can simplify operations significantly. If your team manages Active Directory and identity systems, Azure Active Directory (Entra ID) provides a familiar foundation for access management.

Businesses already using Microsoft 365 often find Azure integrates more naturally than AWS. Single sign-on, unified identity management, and consistent tooling across the Microsoft ecosystem reduce context-switching overhead for IT teams.

If your business builds custom web applications, the choice between a custom content management system and established platforms affects which cloud infrastructure fits best.

Why Simpler Alternatives Deserve Consideration

For many small and medium businesses in the UK, AWS and Azure represent more infrastructure than they need. Managed hosting providers and simpler cloud platforms can handle most business website and application requirements at lower cost with less operational overhead.

DigitalOcean, Hetzner, and similar platforms offer straightforward virtual machines, managed databases, and object storage without the complexity of AWS or Azure service menus. For a business website, an online store, or a simple web application, these platforms often provide everything required.

The decision hinges on what your application actually needs. If you require auto-scaling, multi-region failover, compliance certifications, and managed container services, AWS or Azure make sense. If you need a reliable website with managed backups and reasonable performance, simpler platforms may deliver better value.

What Migration Between Cloud Platforms Involves

Moving from one cloud provider to another is possible but requires careful planning. The application layer is portable — a PHP application or a Node.js API runs on AWS, Azure, or simpler platforms without modification. The data layer requires more care: database migration with live replication, testing against the new database version, and cutover planning to avoid data loss.

Before migrating, assess whether the new platform genuinely meets needs better than the current one. Migration carries risk of downtime, data loss, and unforeseen compatibility issues. The cost savings or benefits must justify that risk.

If you are considering a significant infrastructure change, document your current architecture, test the target platform in a staging environment, and plan the migration during a low-traffic window with rollback procedures in place.

DNS cutover can be managed with low risk if both old and new infrastructure run in parallel during the transition. This parallel operation period allows thorough testing before traffic shifts to the new platform. Back up all data before starting any migration, regardless of which direction you are moving.

How to Make the Final Decision

The choice between AWS and Azure ultimately depends on your specific situation. A business deeply invested in Microsoft technology may find Azure simplifies operations. A business with strong AWS expertise or specific AWS-only service requirements may find AWS serves them better. A business with simpler needs may find neither platform offers the best value.

Evaluate the true cost of each option including management time, not just the monthly bill. A cheaper platform that requires significant internal effort to operate may cost more than a more expensive platform that runs with minimal intervention.

Consider where your team needs to be in three to five years. Building expertise on a platform you will continue using pays off over time. Switching platforms later carries migration costs and knowledge gaps that are worth avoiding if possible.

Document your requirements before evaluating platforms. Performance needs, budget constraints, compliance obligations, team capabilities, and growth expectations all influence which platform serves you best.

Related practical reading

These related guides can help you connect this topic with the wider website, server, security, and support decisions around it.

• SSH Config Tips That Save Hours of Time - useful background for related technology decisions
• How to Build a PHP Webhook Receiver: Complete Implementation Guide - useful background for related technology decisions