ReliaCloud is an Infrastructure as a Service (IaaS) cloud provider that offers reliable, elastic, and low-cost cloud servers and infrastructure. It provides scalable Windows and Linux servers starting at $0.05 per hour without setup fees or long-term contracts. ReliaCloud ensures security through datacenter security policies, firewall perimeter protection, private cloud networks, and customer control over server and firewall access lists. It plans to expand security options through VPN gateway access and private cloud infrastructure.