There are free alternatives, e.g https://github.com/vrtmrz/obsidian-livesync

Also you need a license for anything work related. Since I code in my work time and my free time I can't separate this clearly. To be compliant I would need a license

I use Syncthing with Obsidian. Free and open source.

You can just sync Obsidian with nextcloud, Dropbox or whatever

Obsidian has a free git plugin.