Cloud service providers (CSP) are companies that offers network services, infrastructure, or business applications in the cloud.
Amazon Web Services is a subsidiary of Amazon.com that provides on-demand cloud computing platforms to individuals, companies and governments, on a paid subscription basis.
Microsoft Azure is a cloud computing service created by Microsoft for building, testing, deploying, and managing applications and services through a global network of Microsoft-managed data centers.
Heroku is a cloud platform as a service supporting several programming languages. Heroku, one of the first cloud platforms, has been in development since June 2007.
DigitalOcean, Inc. is an American cloud infrastructure provider headquartered in New York City with data centers worldwide.