There are many Infrastructure as a Service (IaaS) providers available on the market, but the top 10 providers are considered to be:

1. Amazon Web Services (AWS): The largest and most widely-used IaaS provider, with a wide range of services, including compute, storage, and databases, as well as a global network of data centers.
2. Microsoft Azure: A leading IaaS provider that offers a wide range of services, including virtual machines, storage, and networking. Azure also offers a variety of platform-as-a-service (PaaS) options for developing and deploying applications.
3. Google Cloud Platform (GCP): Offers a range of services, including compute, storage, and networking, as well as big data and machine learning services.
4. Alibaba Cloud: A Chinese cloud computing company, it is the largest provider of public cloud services in China and among the top providers globally, it offers a wide range of services including compute, storage, databases, and analytics.
5. IBM Cloud: Offers a wide range of services, including virtual machines, storage, and networking, as well as big data and analytics services.
6. Oracle Cloud Infrastructure: A suite of Infrastructure as a Service (IaaS) and Platform as a Service (PaaS) offerings, offering a wide range of services including compute, storage, and databases.
7. DigitalOcean: a IaaS provider that specializes in developer-friendly services such as simple and affordable virtual servers, Kubernetes, and a managed database service.
8. VMWare: Offers a range of services for on-premises, hybrid and multi-cloud environments, including virtual machines, storage, and networking.
9. Dimension Data Cloud: A global IaaS provider that offers a wide range of services, including virtual machines, storage, and networking, as well as a variety of additional services such as security and compliance.
10. Rackspace: A provider that offers a wide range of services, including virtual machines, storage, and networking, as well as managed services for specific platforms such as AWS and Azure.

Each of these providers offers a wide range of services, and they differ in terms of pricing, service offerings, and geographic coverage. It’s important to evaluate the specific needs of your business and compare the features and pricing of different providers to determine which one is the best fit for your organization.