Amazon Web Services provides a highly reliable, scalable, low-cost infrastructure platform in the cloud that powers hundreds of thousands of enterprise, government and startup customers businesses in 190 countries around the world. Amazon Web Services offers over 30 different services, including Amazon Elastic Compute Cloud (Amazon EC2), Amazon Simple Storage Service (Amazon S3) and Amazon Relational Database Service (Amazon RDS). AWS services are available to customers from data center locations in the U.S., Brazil, Europe, Japan, Singapore and Australia.
aws.amazon.com

Rackspace is a leading provider of hybrid clouds, which enable businesses to run their workloads where they run most effectively . whether on the public cloud, a private cloud, dedicated servers, or a combination of these platforms. Rackspace has been recognized by Bloomberg BusinessWeek as a Top 100 Performing Technology Company, and is featured on Fortune's list of 100 Best Companies to Work For.
www.rackspace.com

Zendesk delivers the leading cloud-based customer service software. Loved by customers for its simplicity and elegance, Zendesk is the easiest and fastest way to provide great customer service.
www.zendesk.com