My team and I use and recommend Acquia Cloud Hosting for each of our client sites that are either self-hosted, or are using generic hosting solutions like DreamHost or DigitalOcean. Not that we have anything against either of those hosting companies; many of us have side-projects and freelance sites hosted there. But for enterprise-level site and repository management, client ease-of-use, basic to advanced levels of Drupal support, and a 99.95% infrastructure uptime SLA, Acquia stands far above their closest competition.
My organization sells its own software solutions that do not compete in any way with Acquia. In-fact, the company's business model is solely geared towards cloud-hosting higher-ed CRM solutions; from a basic, simple implementation of one of our entry-level solutions, all the way up to a managed solution with on-site support staff for the duration of the contract.
Web Services, the team I belong to, is normally an add-on item in the contract to provide website support and maintenance. Many of the schools we works with, like having a single company help them manage all of their Information Technology solutions. As a result, we are just a team of developers. no dedicated dev-ops or network infrastructure billets.