There are no costs involved and everything is open source. The hosting part uses our GitLab Pages feature. We also use this for hosting/sharing Framer prototypes and static HTML pages. You can read more about it on our Superpowers section. We try to dogfood everything!
At GitLab we export specs with the awesome Sketch Measure plugin and commit them with Git to our Design repository. Each Git commit triggers a script in that repository (i.e. a continuous integration pipeline) which automatically “uploads” the specs to a publicly accessible URL. Here's an example of an exported spec: gitlab-org.gitlab.io/gitlab-design/hosted/pedro/ce%2328916-spec-previews
There are no costs involved and everything is open source. The hosting part uses our GitLab Pages feature. We also use this for hosting/sharing Framer prototypes and static HTML pages. You can read more about it on our Superpowers section. We try to dogfood everything!