Originally published December 2021. Updated September 2026 to reflect the UK cloud market investigation, new egress commitments and how AI is changing cloud strategy.
Quick answer: What is the difference between hybrid cloud and multi-cloud?
Hybrid cloud combines public cloud services with private infrastructure, such as on-premises servers or a private cloud, managed as one environment. Multi-cloud means using services from two or more public cloud providers, such as Azure and AWS. Hybrid suits organisations with data residency, latency or legacy constraints. Multi-cloud suits organisations that need resilience across providers or the best service from each. Many mid-sized UK businesses are best served by one primary cloud, designed so they can move if they need to.
Key takeaways
- Hybrid and multi-cloud solve different problems. Choose based on your constraints, not on what’s fashionable.
- Every extra environment adds cost, skills and security work. Complexity is the biggest hidden price.
- Portability by design (infrastructure as code, containers and open data formats) protects you from lock-in without the cost of running everywhere.
- UK regulators have found that egress fees and software licensing make switching providers harder, and the largest providers have committed to changes.
What are public, private, hybrid and multi-cloud?
- Public cloud: computing services rented from a provider such as Microsoft Azure, AWS or Google Cloud, shared infrastructure that you pay for as you use it.
- Private cloud: cloud-style infrastructure dedicated to one organisation, either on-premises or hosted.
- Hybrid cloud: public and private infrastructure connected and managed together.
- Multi-cloud: services from more than one public cloud provider. An organisation can be both hybrid and multi-cloud at once.
How do hybrid cloud and multi-cloud compare?
Aspect | Hybrid cloud | Multi-cloud |
|---|---|---|
What’s combined | Public cloud plus private or on-premises infrastructure | Two or more public cloud providers |
Main reasons | Data residency, legacy systems, latency, gradual migration | Resilience, best-of-breed services, negotiating leverage |
Biggest challenge | Running and securing your own hardware alongside the cloud | Duplicated skills, tooling and security across providers |
Hidden costs | Hardware refresh, networking, on-site expertise | Data egress, licensing on rival clouds, extra monitoring |
Typical fit | Manufacturing, regulated sectors, organisations mid-migration | Larger organisations with critical services and platform teams |
When does hybrid cloud make sense?
- Data must stay in a specific place because of regulation, contracts or customer requirements.
- Legacy systems can’t move yet, but new services can be built in the cloud around them.
- Low latency matters at the edge, for example on factory floors or in warehouses.
- Steady, heavy workloads may be cheaper on owned hardware than on pay-as-you-go cloud.
- You’re migrating in stages and need both worlds to work together for a while.
When does multi-cloud make sense?
- Critical services need provider-level resilience, and you can justify the cost of running them in two places.
- Different providers are genuinely better for different jobs, for example Microsoft 365 and identity on Azure alongside a specialist data or AI service elsewhere.
- Customers or acquisitions require it, such as a client mandating a particular cloud, or a newly acquired business running on another provider.
- AI capacity and model choice. Access to particular AI models or GPU capacity can differ between providers.
Is one cloud provider enough?
For many mid-sized businesses, yes. Running two clouds roughly doubles the platforms your team must understand, secure and monitor, and the resilience benefit only pays off if you actually architect for failover. A single primary cloud, built with portability in mind, usually delivers most of the benefit at a fraction of the cost and effort.
Portability in practice means:
- Infrastructure as code, so environments can be rebuilt and reviewed rather than clicked together by hand.
- Containers for applications that may need to move.
- Open data formats such as Parquet, Delta Lake or Apache Iceberg for analytics data.
- Careful use of proprietary services, choosing them deliberately where they add real value, and knowing your exit route.
What has changed in the UK cloud market?
The Competition and Markets Authority (CMA) investigated the UK cloud market and published its final decision in July 2025. It found that AWS and Microsoft hold significant market power, that egress fees (charges for moving data out of a cloud) discourage switching, and that Microsoft’s software licensing practices reduce competition.
In March 2026 the CMA accepted voluntary commitments from AWS and Microsoft to remove or reduce egress fees and improve interoperability between clouds, and opened a separate investigation into Microsoft’s business software ecosystem. For UK businesses, this should make multi-cloud and switching somewhat easier and cheaper, but it’s still worth checking egress and licensing terms carefully before committing.
How do you choose the right cloud strategy?
- Where must your data live? List regulatory, contractual and customer requirements first.
- Which workloads are critical? Agree how much downtime and data loss each one can tolerate.
- What skills does your team have? Each platform needs people who can run and secure it.
- What would lock-in actually cost you? Estimate the realistic cost of leaving, not the worst case.
- What is the three-year total cost? Include compute, storage, egress, licences, tooling and people, not just headline prices.
Whatever you choose, use one identity provider across every environment and apply zero-trust principles, so security doesn’t depend on which cloud a workload runs in.
How High Digital can help
We design and deliver cloud migrations and data platforms across Azure, AWS and Google Cloud, with a bias towards the simplest architecture that meets your requirements. Scope your project for a straight answer on which approach fits.
Frequently asked questions
What is the main difference between hybrid cloud and multi-cloud?
Hybrid cloud mixes public cloud with private or on-premises infrastructure. Multi-cloud uses more than one public cloud provider. A business can be both.
Is multi-cloud more expensive?
Usually, once you include duplicated skills, tooling, security and data transfer. It can still be worth it for critical services or where providers offer genuinely different capabilities.
How can I avoid cloud vendor lock-in?
Design for portability: infrastructure as code, containers where appropriate, open data formats, and deliberate use of proprietary services with a known exit route.
Is hybrid cloud secure?
It can be, but it needs consistent identity, patching and monitoring across both environments. Gaps between environments are where problems tend to occur.
What did the CMA decide about the UK cloud market?
In July 2025 it found that competition was being held back by egress fees and Microsoft’s licensing practices. In March 2026 it accepted voluntary commitments from AWS and Microsoft on egress fees and interoperability, and opened an investigation into Microsoft’s business software ecosystem.