Colocation

Ultra Hosting provides various levels of virtual servers, dedicated servers and server colocation. They do not provide shared web hosting. They claim to offer high reliability starting with a large staff of technicians, good management processes, continuous improvement, etc.

They offer management services in which their staff takes some of the load of managing the server. This includes monitoring, rebooting as necessary, security hardening, software install, etc. All this depends on the level of service you buy.

Offers a comprehensive range of shared hosting, and colocation plans. Xmission has been in the web hosting business since 1993. It appears their service offers essentially everything you could want.

They purchase renewable power through Rocky Mountain Power's Blue Sky program.

Pair Networks was one of the earliest of the web hosting providers, and have remained independent for nearly 15 years. They provide an exhaustive array of web hosting plans, and they are a domain registrar (PAIRNIC).

They are Carbon Neutral (Pair Networks Environmental Policy) through buying carbon credits using the TerraPass plan. Plus they have some energy saving policies etc.