Ask HN: Which Companies Self-Host?

I'm looking for companies that prefer self-hosting to using cloud services. I'm building a self-hosted alternative to Gitpod and Github Codespaces that works with Gitlab, Gitea, Gerrit, and any other Git provider that supports SSH. It's at https://hocus.dev if you want to check it out. I'm looking for people who would like to try it out, and I figured such companies may be interested.

What companies do you know that self-host?