DreamHost is a Los Angeles-based web hosting provider and domain name registrar. It is owned by New Dream Network, LLC, founded in 1996 by Dallas Bethune, Josh Jones, Michael Rodriguez and Sage Weil, undergraduate students at Harvey Mudd College in Claremont, California, and registered in 1997 by Michael Rodriguez. DreamHost began hosting customers' sites in 1997. In May 2012, DreamHost spun off Inktank. Inktank is a professional services and support company for the open source Ceph file system. In November 2014, DreamHost spun off Akanda, an open source network virtualization project. As of February 2016, Dreamhost employs about 200 people and has close to 400,000 customers.

DreamHost's shared, VPS, and dedicated hosting network consists of Apache, nginx and lighttpd web servers running on the Ubuntu operating system. DreamHost also offers cloud storage and computing services for entrepreneurs and developers, launched in 2012. The control panel for users to manage all services is a custom application designed in-house, and includes integrated billing and a support ticket system. DreamHost's staff contributes to an official blog and a customer support wiki.

DreamHost does not offer call-in phone support, but customers can pay extra to request callbacks from support staff. Furthermore, a live chat option is available for all accounts when the level of support emails is low. This option is always available for customers who already pay the monthly fee for callbacks. The company hosts in excess of one million domains.

In 2006, the company began a beta version file hosting service they called "Files Forever". The company stated that existing customers could store files "forever" after paying a one-time storage fee, and redistribute or sell them with DreamHost handling the transactions. As of November 2012, this service was no longer offered to new customers. In April 2013, DreamHost mentioned that the Files Forever service had been discontinued and that they would focus on building a better-supported storage technology.

In 2009, the company began offering free web application hosting. With either their own domain or a free subdomain, customers were able to make use of several open source applications, such as WordPress and MediaWiki without charge. The service is similar to, and can be integrated with, the Google App Engine. Through a control panel, customers can manage their applications or upgrade to the standard, fully managed hosting service.

DreamHost's DreamCompute is a public cloud computing service that provides scalable compute resources for developers and entrepreneurs. DreamCompute users select the amount of compute resources and storage resources needed and define their own virtual networks. DreamCompute is powered by OpenStack and Ceph and is designed for scalability, resiliency, and security.

The DreamCompute dashboard is built with OpenStack's Horizon project. The dashboard provides a user interface for interacting with DreamCompute's three main services: Compute, Networking, and Storage. Functions such as launching an instance, creating storage volumes, and configuring a virtual network, as well as creating and managing snapshots of both a running instance and storage volumes, are done in the dashboard.

DreamCompute leverages OpenStack APIs for system automation.