Depends on your needs.
I’ve used OwnTracks, Google Location Sharing, Life360 (both a python script, and the component that’s out there nowadays).
If privacy is an issue, I guess that’s what OwnTracks touts. But it was horribly unreliable for me. Slow to update, to a degree that it was not usable.
Total experience: The best I’ve tried is by far the Life360 with the “new” custom component. Before I found the custom component, Google Location sharing was my go-to.
Now I have implemented an appdaemon “meta-tracker” (see my config of it here) based on the same by arsaboo. This allows me to integrate ping, google, life360, bluetooth tracker, and iOS trackers. I’ve made it so ping and bluetooth can set to “home” but not to “away” (sine you might loose connection to router/bluetooth while home, but you would never connect to them while not home).
You could easily integrate OwnTracks into this, and that might give you the privacy, while also being somewhat reliable (if you’re mostly interested in home/not_home, and don’t mind slow updates of location outside of you home). I just really started to like all the additional info in the Life360, so I kept that. It natively shows speed you’re moving (and uses this to natively give you the state “driving”, “moving” or others, based on this), battery %, whether or not you’re charging, whether wifi is on, etc. Plus it was more straight forward to set up for my girlfriend and kids.
Only issue (for me) is the reliance of the cloud API. So you need to trust (or not care) that your data is private, and you need to trust that they won’t do something that breaks the component.