Backup and Disaster Recovery in the Cloud: Designing for RPO and RTO
How to design cloud backup and disaster recovery around RPO and RTO targets, comparing backup, pilot light, warm standby and active-active options.
Choosing a public cloud provider is one of the most consequential technology decisions a small or mid-sized business will make. Once applications, data and staff habits settle on a platform, moving away becomes slow and expensive. Amazon Web Services (AWS), Microsoft Azure and Google Cloud are the three dominant providers, and all three are capable of running almost any workload an SME is likely to have. The real question is not which is "best" in the abstract, but which fits your existing systems, skills and plans. This review sets out how the three compare in practice and gives you a structured way to decide.
Large enterprises often evaluate clouds on niche capabilities such as specialised machine learning hardware or global network performance. Most SMEs have more grounded priorities:
Keep these criteria in front of you as you read the comparisons below. A feature that looks impressive in a product announcement is worth little if your team will never use it.
AWS was the first of the three to offer infrastructure services at scale, and that head start shows in the sheer breadth of its catalogue. For almost any requirement there is a managed service, and often more than one. Documentation, community answers and third-party tooling are plentiful, which makes problem-solving easier for small teams.
Strengths for SMEs: a very wide choice of instance types and managed services; a large pool of engineers and consultants familiar with the platform; mature tooling for infrastructure as code; and well-established patterns for common architectures such as web applications and data pipelines.
Weaknesses for SMEs: the size of the catalogue can be overwhelming, and similar-sounding services can lead to confusion. The console and billing can feel complex to newcomers, and integration with Microsoft-centric office environments requires more deliberate configuration than on Azure.
Many SMEs already run Microsoft 365 for email, documents and collaboration, and use Microsoft Entra ID (formerly Azure Active Directory) for user sign-in. Azure builds directly on that identity layer, which means user accounts, groups and conditional access policies can extend into the cloud platform with little extra effort.
Strengths for SMEs: tight integration with Microsoft 365 and Entra ID; strong support for Windows Server, SQL Server and .NET workloads; licensing benefits that can allow existing Windows Server and SQL Server licences to be reused; and good options for hybrid set-ups where some servers remain on premises.
Weaknesses for SMEs: service naming and portal layout change relatively often, which can make older guidance out of date. Some users find the permissions model across subscriptions, resource groups and management groups harder to reason about at first. Linux and open-source workloads are fully supported, but the platform's advantages are most pronounced for Microsoft stacks.
Google Cloud is the smallest of the three by market share but is often praised for a cleaner console, a more consistent project-based structure and strong data analytics and container services. Its managed Kubernetes offering and serverless platforms are well regarded, and its analytics warehouse is a common reason organisations adopt it.
Strengths for SMEs: a relatively intuitive project and billing structure; automatic discounts for sustained use on some compute services; excellent analytics and machine learning tooling; and good integration with Google Workspace for organisations that use it.
Weaknesses for SMEs: a smaller local partner ecosystem in some regions; fewer staff with hands-on experience in the job market compared with AWS and Azure; and historically a narrower range of enterprise application integrations, although this gap has narrowed.
The table below summarises how the three providers tend to compare on the criteria that matter most to smaller organisations. These are general characteristics rather than absolute rankings; your own workloads and region may change the picture.
| Criterion | AWS | Microsoft Azure | Google Cloud |
|---|---|---|---|
| Best fit | Broad, mixed workloads; teams wanting maximum choice | Microsoft 365 and Windows-centric organisations | Data analytics, containers and cloud-native apps |
| Identity integration | IAM Identity Center; federates with most providers | Native Entra ID integration | Cloud Identity; strong with Google Workspace |
| Learning curve | Moderate to steep due to catalogue size | Moderate; familiar to Microsoft administrators | Generally gentler console and structure |
| Licensing advantages | Bring-your-own-licence options available | Strong reuse of Windows Server and SQL Server licences | Bring-your-own-licence options available |
| Discount models | Savings Plans, Reserved Instances, Spot | Reservations, Savings Plans, Spot | Committed use and sustained use discounts, Spot |
| Skills availability | Very wide | Very wide, especially among Microsoft administrators | Good but narrower |
| Hybrid and on-premises | Outposts and hybrid tooling | Azure Arc and strong hybrid story | Anthos / GKE Enterprise for container-based hybrid |
Rather than relying on reputation, work through a short, structured evaluation:
All three providers are capable, secure and reliable when configured correctly, so the decision usually comes down to fit rather than raw capability. For organisations deeply invested in Microsoft 365 and Windows workloads, Azure is typically the most natural choice. For teams that want the widest selection of services and the deepest talent pool, AWS remains a safe default. For data-heavy or container-first businesses, particularly those already using Google Workspace, Google Cloud offers a clean and capable platform. Whatever you choose, invest early in identity, cost controls and infrastructure as code. Those foundations will matter far more to your long-term success than the logo on the console.
This article is for general information only and does not constitute professional, legal or financial advice. Product features and terms change over time, so always confirm details with the vendor. See our disclaimer.