I've tried a couple of self-hosted solutions to accompany my use of Google Photos in case Google ever decides to pull a stunt with Photos.

Nextcloud was basic, but serviceable. I liked that it handled docs, contact sync, etc. The sync was clumsy and I found updates frequently broke the system.

I just tried PhotoPrism with my ~75GB photo directory. The classification is.. decent and all run locally. It took around a full 24 hours to index and classify my photos, which it did reasonably well. Google Photos' classifications is miles better to be sure, but PhotoPrism was easy to set up and works pretty well.

I no longer expose any of my services outside my local network (besides Wireguard) so I'm hoping to find a Photosync system that will only upload when on my home wifi and charging. Any suggestions there?