GitLab Pages vs SiteGround: What are the differences?
Developers describe GitLab Pages as "Create websites for your GitLab projects, groups, or user account". Host your static websites on GitLab.com for free, or on your own GitLab Enterprise Edition instance. Use any static website generator: Jekyll, Middleman, Hexo, Hugo, Pelican, and more. On the other hand, SiteGround is detailed as "A shared hosting provider that offers its users multiple different hosting options". It is a web hosting company and reports servicing more than 1,800,000 domains worldwide. It provides shared hosting, cloud hosting and dedicated servers as well as email hosting and domain registration.
GitLab Pages can be classified as a tool in the "Static Web Hosting" category, while SiteGround is grouped under "Cloud Hosting".