AWS vs Azure vs Google Cloud: Which Platform Fits Your Migration Needs?

Cloud migration is not just a technical upgrade, it’s a strategic business decision. But if you’re weighing up Amazon Web Services (AWS), Microsoft Azure or Google Cloud Platform (GCP), the landscape can feel like a maze of acronyms, confusing pricing tiers, and disorienting technical features.

So, which platform makes the most sense for your business – especially if you’re based in the UK?

This guide walks you through a clear, UK-relevant comparison of the three biggest cloud providers. It covers everything from infrastructure and security, to pricing, hybrid capabilities and AI innovation – all written in plain English.

A Quick Introduction: The Big Three

AWS: The global market leader with the widest range of services. Mature, reliable, powerful – but sometimes can be a bit complex to manage.

Azure: The natural home for businesses already using a lot of the Microsoft suite. Strong in hybrid setups, security, and enterprise compliance.

GCP: Google’s cloud is data-first and developer-friendly. Ideal for analytics-heavy workloads, AI, and businesses going all-in on modern, cloud-native apps.

Each offers UK data centres and GDPR-aligned services. So it really comes down to what you need most, and what fits your current structure best.

Local Infrastructure and Performance

All three providers operate UK regions – so performance, speed and compliance aren’t deal-breakers. But there are some subtle differences.

AWS has the broadest global infrastructure, with a well-established London region since 2016. It’s a safe bet for businesses with international ambitions.

Azure runs two UK regions (UK South and UK West), and is especially well-adopted by the UK public sector thanks to strong compliance credentials and enterprise familiarity.

GCP offers slightly fewer regions overall but has a powerful UK presence and one of the fastest networks, backed by Google’s private global fibre. If speed and data analytics matter, it stands out.

Cost Comparison

AWS: Hugely flexible – and that’s both a strength and a weakness. You can fine-tune every penny, but only if you’re confident with the platform. Reserved Instances and Spot pricing offer savings of up to 72%.

Azure: Often the most cost-effective for Microsoft-centric businesses, especially if you already pay for SQL or Windows Server. Azure Hybrid Benefit can slash licensing costs significantly.

GCP: Transparent, with built-in discounts. If you use services consistently, you’ll see savings without having to commit upfront. Ideal for predictable workloads.

Top Tip: Before migrating, it’s worth getting a clear picture of your expected cloud costs. Pricing calculators are essential – but a second opinion from a cloud partner like Optimising IT can make all the difference.

Security and Compliance

All three platforms meet key standards like ISO 27001, SOC 2, PCI-DSS and GDPR. But they differ in tools and philosophy.

AWS: Highly secure, with advanced IAM and encryption. Ideal for regulated industries – but complex to configure correctly.

Azure: A natural choice for businesses already using Active Directory and Microsoft security tools. Also favoured in the UK public sector.

GCP: Strong by default. Everything is encrypted at rest and in transit, and Google leads in zero-trust architecture. AI-driven security tooling is a bonus.

Top Tip: If you’re planning a secure migration, our cloud security audit checklist offers a simple starting point.

Hybrid and Multi-Cloud

Not every business can move everything to the cloud in one go – and sometimes, hybrid is a solid long-term strategy.

Azure leads the pack with Azure Arc and Azure Stack. If you’re running a hybrid setup (on-prem and cloud), it’s seamless.

AWS supports hybrid via Outposts and Direct Connect but prefers a full-cloud approach.

GCP shines in multi-cloud, thanks to Anthos – a Kubernetes-based tool that lets you manage apps across AWS, Azure, and on-prem from one place.

Innovation & AI

AWS: The biggest toolbox – with everything from robotics to quantum computing. AWS is the enterprise heavyweight.

Azure: Closely integrated with Microsoft 365 and Dynamics, and the cloud of choice for OpenAI (yes, that includes GPT-4). Great for B2B apps and productivity use cases.

GCP: Leading in big data, AI and machine learning. BigQuery, TensorFlow and Vertex AI are all best-in-class. Ideal for analytics-heavy workloads and fast innovation.

Top Tip: AI evolving fast, it’s worth considering the AI security risks and compliance challenges that come with those capabilities.

Ease of Use & Support

AWS: Steep learning curve, but unmatched community support and third-party tools.

Azure: Most familiar for Microsoft-trained teams. Plenty of UK-certified talent and a rich knowledge base.

GCP: Cleanest interface and easiest for beginners. Great for fast-moving teams or startups.

Migration Support

All three providers offer great migration tools – and all support hybrid transitions, rehosting, and modernisation.

AWS Migration Hub, DMS, Snowball – comprehensive, but you’ll need some technical firepower.

Azure Migrate, Site Recovery, Data Box – especially smooth for Microsoft environments. Also offers funding support for large UK migrations.

GCP Migration Center, Migrate for Anthos – ideal if you’re modernising while migrating (e.g., containerisation).

Top Tip: Don’t go it alone. Optimising IT offers expert-led cloud migration services, including assessment, planning and hands-on execution across all three providers – backed by cloud security solutions that actually work in practice.

So… Which One Fits Your Business Best?

Make the Cloud Work for You

Choosing between AWS, Azure and GCP isn’t about finding an outright winner – it’s about finding the right match for your business.

Think beyond technical specs and consider what your team knows, what your customers need, and where you want to go in the next 3–5 years.

At Optimising IT, we’ve helped hundreds of businesses migrate to the cloud smoothly and confidently. Whether it’s Azure, AWS, or GCP, we’ll help you find the right solution for you, and help you transition without disruption.

Not sure which cloud provider is right for you? Let’s talk.