Watchbuoy

Watchbuoy pings your services — HTTP, TCP, DNS, containers — and turns the results into a clean dashboard, notification rules, and a public status page you would not be embarrassed to link.

Worth knowing before you commit:

• Setup-to-first-alert is minutes, not an afternoon.
• Notification integrations cover the long tail of chat apps.
• Certificate expiry checks are built in — set them and forget them.

The first monitoring tool most homelabs install, and deservedly so.