Checkup vs Hund: What are the differences?
Developers describe Checkup as "Distributed, lock-free, self-hosted health checks and status pages". Checkup can be customized to check up on any of your sites or services at any time, from any infrastructure, using any storage provider of your choice. The status page can be customized to your liking since you can do your checks however you want. On the other hand, Hund is detailed as "Automated Status Pages with Monitoring". Monitor services and keep your audience informed of status changes with an automated hosted status page.
Checkup and Hund can be categorized as "Status Page Hosting" tools.
Checkup is an open source tool with 2.65K GitHub stars and 193 GitHub forks. Here's a link to Checkup's open source repository on GitHub.