We should have a list of who is using Zonemaster.
Here are some examples of how other people have done it:

• https://github.com/nttgin/BGPalerter/blob/main/docs/friends.md
• List of companies using BGPalerter nttgin/BGPalerter#397

If you are a user of Zonemaster and would like to see your name in that list, please comment in this issue. If you have a public installation, you can add a link to it too.