If you still want to use the algorithms but keep the data private (self hosted and open source), I can suggest Librephotos. It has face detection, object detect

If you still want to use the algorithms but keep the data private (self hosted and open source), I can suggest Librephotos. It has face detection, object detection, place markers, etc. It is not perfect but from what I have seen, it's currently still the best self hosted open source solution.