Multi-cloud — running workloads across two or more cloud providers — has become one of the most discussed strategies in enterprise IT. Proponents argue it reduces vendor lock-in, improves resilience, and lets you pick the best services from each provider. Critics point to the operational complexity, higher costs, and skills challenges it introduces. The truth, as usual, lies somewhere in between.
What Multi-Cloud Actually Means
It is important to distinguish between different forms of multi-cloud:
- Strategic multi-cloud — deliberately running the same or related workloads across multiple providers for resilience, compliance, or best-of-breed service selection.
- Accidental multi-cloud — different teams or business units independently choosing different providers, resulting in a fragmented cloud estate with no unified strategy.
- Hybrid cloud — combining on-premises infrastructure with one or more public cloud providers, which is technically distinct from multi-cloud but often discussed together.
Many organisations that claim to be multi-cloud are actually running accidental multi-cloud, which delivers few of the benefits and most of the drawbacks.
Real Benefits of Multi-Cloud
- Reduced vendor lock-in — distributing workloads across providers gives you negotiating leverage and reduces the risk of being trapped by a single vendor's pricing changes or service deprecations.
- Best-of-breed services — some providers genuinely excel in specific areas. You might use AWS for its breadth of managed services while leveraging Azure for its Active Directory integration or Google Cloud for its data analytics capabilities.
- Regulatory compliance — certain regulations or client requirements may mandate that data or workloads run in specific geographic regions or on specific providers. Multi-cloud gives you the flexibility to meet these requirements.
- Disaster recovery — running critical workloads across providers can protect against provider-level outages, though this level of resilience comes at significant cost and complexity. See our disaster recovery guide for more detail.
The Pitfalls and Hidden Costs
The challenges of multi-cloud are substantial and often underestimated:
- Operational complexity — each cloud provider has its own APIs, networking model, identity system, and management tools. Your team needs deep expertise across all of them, which is difficult and expensive to maintain.
- Data transfer costs — moving data between cloud providers incurs egress charges that can be surprisingly large. Architectures that require frequent cross-cloud data synchronisation can generate significant ongoing costs.
- Inconsistent security posture — maintaining consistent security policies, monitoring, and incident response across multiple providers is challenging. Each provider has different security services, logging formats, and compliance certifications.
- Skills fragmentation — instead of building deep expertise in one platform, your team must spread their knowledge across multiple platforms. In Belgium's competitive IT talent market, finding engineers with multi-cloud experience is particularly difficult.
- Lowest common denominator — to maintain portability, teams often avoid using provider-specific managed services, instead running generic solutions like self-managed databases. This eliminates many of the benefits of cloud migration in the first place.
When Multi-Cloud Makes Sense
Multi-cloud is justified in specific scenarios:
- Regulatory requirements — when Belgian or EU regulations require data to be stored or processed on specific platforms or in specific regions.
- M&A integration — when merging organisations that are already on different cloud providers, and a full migration is not immediately feasible.
- Genuine best-of-breed needs — when specific workloads have clear, measurable benefits from running on a particular provider that cannot be replicated elsewhere.
- Enterprise scale — large organisations with dedicated platform teams and sufficient budget to absorb the overhead.
A Pragmatic Approach
For most Belgian mid-market companies, a single primary cloud provider with selective use of a second provider is the most pragmatic approach:
- Choose one primary provider for the majority of your workloads and invest deeply in that platform's services and tooling.
- Use infrastructure as code tools like Terraform that support multiple providers, making future migration easier without forcing premature multi-cloud adoption.
- Design applications with clean abstractions (APIs, message queues, standard protocols) that make them portable without requiring Kubernetes-everywhere architectures.
- Consider a second provider only when there is a clear, specific business case — not as a general hedge against lock-in.
How ICTLAB Can Help
ICTLAB provides cloud strategy consulting for Belgian organisations evaluating multi-cloud approaches. We help you assess whether multi-cloud is genuinely the right strategy for your organisation, design architectures that balance portability with provider-specific value, and implement the tooling and processes needed to operate effectively across cloud environments.