Traccar is an open source fleet management solution that allows you to track vehicles and devices via a self-hosted server without using Google, Apple, Garmin, Suunto or other brands. If you setup your own server you can track as many vehicles as you like, and even track their live movements.
Options I did not use it as a vehicle tracker. I used it as a personal GPS tracker, as I went for my daily walk yesterday afternoon.
Google, Apple and Microsoft have cloud storage solutions. So does Evernote, Kdrive and other products. The issue with all of these solutions is that they are owned by corporations. They are simple and convenient to use but at the cost of being locked in to an OS in some cases, and to corporate interests.
NextCloud is an open source alternative with hosting solutions that offer people with the choice of choosing between hosting solutions that are as local, or as remote as they want.