Nexcess is an interesting hosting company. Formerly its own company, it is now a subsidiary, offering services that its parent company (Liquid Web) does not. Liquid Web offers both virtual and physical servers. Nexcess focuses largely on shared hosting with an emphasis on fast infrastructure and simplicity.
Nexcess does offer other services like flexible cloud hosting and enterprise hosting, but its flagship offering is managed WordPress, Magento, and WooCommerce hosting. Also supported are, Joomla, Drupal, Craft CMS, and ExpressionEngine*.
The service is geared toward publishing and online stores and is pretty reasonably priced. They are reasonable if your site makes money, since this hosting package is not too cheap.