Featured article: Cloud Computing 101: What is Cloud Computing?
Utilizing technologies not hosted/controlled by you or your organization. A great example is Software-as-a-Service (SaaS). The application could be hosted on large server farm, and delivered to millions of users, however, each user only pays for the amount resouces they use.
This is almost the best of both worlds. While you can host your own "cloud" at the office, you may also utilize public cloud services. A great example is cloud backup services. While you store data on your own virtual servers, but chances are you backup to a cloud resource. This time your cost are to maintain and support the private cloud servers and pay for resouces you use for backup.
Everything, is entierly owned and operated by you or your managed IT support company. This is most costly solution. All servers, switches, routers, firewalls, internet connectivity, power, and room temperature must be maintained. This makes most sense for larger organization that have mission critical applications or private data that must be available even offline. Even backups are held on local-hosted storage systems or taken offsite on portable USB drivers or tapes.
We offer a per-resource/license based pricing plan. While this is "public cloud" hosting, we bring some advantages and flexibility that our competitors cannot.