Does face recognition work on group photos and low-light shots?

Yes. Pixeva indexes every face it can detect in a frame, including group shots, and matches a guest to all of them, not just photos where they are the main subject.

Dim reception lighting, side profiles, and partial occlusion are harder and can lower confidence, which is why a clear, front-facing selfie improves results. In practice, accuracy on real event galleries is around 99% for guests who appear clearly in at least a few photos.