The best-known example of a cloud service provider is Amazon Web Services (AWS). Microsoft Azure and Google Cloud are the other two of the "big three". Each rents computing power, storage, databases and AI services over the internet, billed by use. Oracle, IBM, Alibaba Cloud and European providers such as OVHcloud and Hetzner are further examples.
Key takeaways
- AWS, Microsoft and Google led the market in Q2 2026 with 28%, 20% and 15% shares, according to Synergy Research Group.
- Beyond the big three there are second-tier global clouds, European and sovereign providers, Indian data-centre operators and GPU clouds for AI.
- Examples differ by service model: Amazon EC2 is IaaS, Azure App Service is PaaS, Microsoft 365 and Salesforce are SaaS.
- NIST defines cloud by five traits, including on-demand self-service and measured service. A hosting company without these is not really a cloud.
- Pick a provider on regions, services you need, skills you have and exit options, not market share alone.
What counts as a cloud provider?
A cloud provider runs shared data centres and lets customers rent resources on demand through a web console or API. The US standards body NIST gives the reference definition in SP 800-145, The NIST Definition of Cloud Computing. It lists five essential characteristics:
- On-demand self-service: you provision servers or storage yourself, without calling anyone.
- Broad network access: services are reachable over the network from standard devices.
- Resource pooling: many customers share the provider's hardware.
- Rapid elasticity: capacity grows and shrinks quickly with demand.
- Measured service: usage is metered and billed.
The same document defines three service models (IaaS, PaaS, SaaS) and four deployment models (private, community, public and hybrid). For the wider picture of providers in general, see our guide to service provider types and examples.
The big three: AWS, Microsoft Azure and Google Cloud
Synergy Research Group estimated enterprise spending on cloud infrastructure services at $143 billion in Q2 2026, with 43% growth year on year. Amazon held 28% of the worldwide market, Microsoft 20% and Google 15%.
| Provider | Q2 2026 share | Known for | Example services |
|---|---|---|---|
| Amazon Web Services | 28% | A very broad service catalogue and a large partner ecosystem | EC2 (compute), S3 (storage), RDS (databases), Bedrock (AI models) |
| Microsoft Azure | 20% | Fit with Microsoft 365, Entra ID, Windows Server and hybrid setups | Azure Virtual Machines, Azure SQL, App Service, Azure OpenAI |
| Google Cloud | 15% | Data analytics, Kubernetes and AI | Compute Engine, BigQuery, GKE, Vertex AI |
Their footprints are large. AWS states that its cloud spans 124 Availability Zones within 39 geographic regions, with more announced. All three run regions in the Nordics and in India, which matters for data residency.
Other cloud provider examples
Second-tier global clouds
- Oracle Cloud Infrastructure (OCI): often chosen for Oracle databases and applications.
- IBM Cloud: focused on regulated industries, mainframe links and hybrid setups with Red Hat OpenShift.
- Alibaba Cloud: Alibaba Group's cloud arm, strongest in China and wider Asia.
European and sovereign providers
- OVHcloud (France), Hetzner (Germany), Scaleway (France) and UpCloud (Finland) offer compute and storage under European ownership.
- They suit buyers who want an EU-owned provider for some workloads, though their managed service catalogues are smaller than the hyperscalers'.
Indian providers
- Data-centre and cloud operators such as Tata Communications, Yotta and CtrlS serve Indian companies and public-sector buyers that want capacity owned and run in India.
GPU and AI clouds
- Specialists such as CoreWeave and Nebius rent GPU capacity for AI training and inference. The same research names both, with Oracle, among the fastest-growing tier-two providers.
Examples by service model: IaaS, PaaS and SaaS
"Cloud provider" can mean a platform you build on or software you simply use. The service model decides how much you still manage.
| Model | You manage | Examples |
|---|---|---|
| IaaS | Operating system, middleware, applications, data | Amazon EC2, Azure Virtual Machines, Google Compute Engine |
| PaaS | Applications and data | AWS Elastic Beanstalk, Azure App Service, Google App Engine, managed databases such as Amazon RDS |
| SaaS | Users, settings and your data | Microsoft 365, Google Workspace, Salesforce |
Many companies use all three at once: SaaS for email and CRM, PaaS for databases, IaaS for legacy servers they have moved.
Which provider fits which kind of company?
There is no single best provider. These patterns come up often in practice:
- Microsoft-centred companies with Windows Server, SQL Server and Microsoft 365 licences often start on Azure, because identity and licensing carry over.
- Software and e-commerce firms building new products often pick AWS for the breadth of managed services and the size of the hiring pool.
- Data-heavy teams often run analytics on Google Cloud, using BigQuery, even when their main estate sits elsewhere.
- Public sector and regulated buyers may keep some workloads with a national or EU-owned provider and use a hyperscaler for the rest.
- AI start-ups may rent GPUs from a specialist cloud and keep their application and data on a hyperscaler.
Using more than one provider
Many organisations end up with two or more clouds, often by accident: a merger, a SaaS choice or one team's preference. Running several on purpose can reduce dependence on one vendor and give access to the best service for each job. The cost is extra skills, tooling and security work for every platform you add. A good rule is one primary cloud, with others added only for a clear reason.
Risks to plan for with any cloud provider
- Outages. Each provider publishes SLAs per service, and they differ. Design critical systems across several Availability Zones, and test recovery.
- Data transfer costs. Moving data out of a cloud, or between regions, is often billed separately. Model it before you design the architecture.
- Switching. In the EU, the Data Act (Regulation (EU) 2023/2854) applies from 12 September 2025. Under Article 29, providers may charge only reduced switching fees until 12 January 2027 and no switching charges after that date.
- Data protection. Choosing an EU or Indian region keeps data at rest local, but you still need contracts that cover remote access and support staff in other countries.
- Shared responsibility. The provider secures the platform; you secure your configuration, identities and data. Agree in writing which of those settings your team or your partner owns.
How to choose between cloud providers
- Start from your workloads. Heavy Microsoft licensing points towards Azure; deep analytics needs may point towards Google Cloud; a broad mix of services often lands on AWS.
- Check the regions you need. Confirm that the services you plan to use are available in your target regions, not just that the region exists.
- Count your skills. Your team's certifications and experience lower risk more than a small price difference.
- Model the total cost. Include data transfer, support plans and the staff time to run it, not just instance prices.
- Plan the exit. Prefer open standards (containers, Terraform, PostgreSQL) where lock-in would hurt.
For a side-by-side view, read our practical cloud provider comparison. If you need someone to run the platform after you choose it, that is a managed services partner, covered in cloud partner examples.
Example: moving a seasonal business to AWS
Branäsgruppen, one of Sweden's largest ski resort groups, earns most of its trade between December and April. Its on-premises VMware setup needed manual scaling before peaks, and deployments meant taking the whole environment down. Opsio moved it to AWS with auto scaling, multi-AZ deployment and managed databases. According to the Branäsgruppen case study, the result was 40% better average page responsiveness, a 40% lower total cost of ownership and 99.9%+ application uptime. It shows the main point of a cloud provider: capacity that follows demand instead of being bought for the peak.
How Opsio helps
Opsio does not own data centres; we help companies use AWS, Azure and Google Cloud well. That covers migration to AWS, migration to Azure and 24/7 operation afterwards.
Frequently asked questions
What is an example of a cloud service provider?
Amazon Web Services (AWS) is the most widely cited example. Microsoft Azure and Google Cloud are the other two largest. Oracle Cloud, IBM Cloud, Alibaba Cloud, OVHcloud and Hetzner are further examples.
Who are the top 3 cloud providers?
AWS, Microsoft Azure and Google Cloud. Q2 2026 market estimates put their worldwide shares at 28%, 20% and 15%.
Is Microsoft 365 a cloud provider?
Microsoft is the provider; Microsoft 365 is one of its SaaS products. It runs on Microsoft's cloud, and you use it over the internet without managing servers.
Is a hosting company the same as a cloud provider?
Not always. A classic hosting company rents you a fixed server on a monthly contract. A cloud provider lets you create and remove resources yourself in minutes and bills by usage, matching NIST's characteristics.
What is the difference between a cloud provider and a cloud partner?
The provider owns and runs the platform, such as AWS. A partner is an independent firm that helps you plan, migrate to, run or buy that platform, often with validations from the provider's partner programme.
For hands-on delivery, see how to choose between AWS, Azure and Google Cloud.
Related reading
Written By

Country Manager, Sweden
Johan leads Opsio's Sweden operations, driving AI adoption, DevOps transformation, security strategy, and cloud solutioning for Nordic enterprises. With 12+ years in enterprise cloud infrastructure, he has delivered 200+ projects across AWS, Azure, and GCP — specialising in Well-Architected reviews, landing zone design, and multi-cloud strategy.
Editorial standards: This article was written by the cloud practitioner named in the byline above. We revise it when the technology or regulation it covers changes; the dates on this page show the latest update. Opsio maintains editorial independence.