Seconding photoprism. The face recognition was pretty meh when it was first introduced, more of a gimmick than anything. But (I assume) a recent update pushed it into "wow, this is actually really good" territory.

Thirding photoprism, got it hosted on a raspberry pi and made it accessible outside of my home via Tailscale. Seems to work fairly well... though I could probably make it faster with an SSD vs an HDD over USB.

Photoprism is absolutely amazing. It was the quickest donation I’ve ever made to an OSS project.

I have a Photoprism instance running on my home server backed by a raidz1 ZFS pool (1st backup). Photos are periodically synced to a Backblaze bucket with versioning enabled (2nd backup). The source of most photos is an iOS device with iCloud enabled (main copy). I rely on PhotoSync to periodically sync from the iOS device to Photoprism.

To photoprism users: do you know how well it handles identifying photos of kids over the span of years?

Google photos absolutely blows me away with its ~1% false positive rate (that is, given a photo, correctly identifying with kid(s) are in it) identifying each of my kids, nieces, and nephews. I don’t really know what its false negative rate (a false negative would be an uploaded photo of John but that doesn’t get tagged as having John in it) is, though.

I can search for each of my kids and see photos of them going back to their birth.

Don't have any data on that unfortunately.