There are quite a few and of course it depends on your needs. Personally I like AWS and SoftLayer. They both have world class data centers and tons of different

There are quite a few and of course it depends on your needs. Personally I like AWS and SoftLayer. They both have world class data centers and tons of different advanced ways to build and configure systems, numerous availability zones across the globe, etc. DigitalOcean is a really wonderful, cheap, and performant solution for rapid prototyping and other projects where you don't want to be burdened with unnecessary complexity or high costs. I often use a DigitalOcean droplet as a personal development environment for this reason. However, I don't think DigitalOcean is a great fit for enterprise systems or for projects that are ready to start planting deep roots. In other words, it's probably a bad fit for someone looking to provide hosting for 38k sites.