To answer your question, there are several biometric options these days. I know a few people who have the speed vault posted above and like it. The other thing to consider is how and where to secure the handgun safe. At a minimum you want to secure it with a cable lock. However, I suggest re evaluating a home defense weapon. I personally would not chose a handgun because if I miss a shot, the round is going through a wall with most of its inertia. Like you, I have other people living in the house (on the other side of said walls). I opted for a tactical shotgun with picatinny rails for a remote pressure light. The first 2 shells are birdshot (8 and 6) followed by 2 buck and finally a slug. Birdshot will still go through a wall but it would not be as severe. I increase the stopping power in my shot selection since my goal is to neutralize the threat while making a reasonable attempt the preserve the threats life (knowing full well that it creates additional risk for my own life and legal liability). For that, I receive a lot of criticism but I do it out of personal beliefs. To each his own. The other aspect I like about a shotty is that it’s hard to miss. There is a difference between shooting at a range and shooting in the middle of the night, half asleep, with adrenaline pumping. Unless I’ve done a lot of tactical classes and competitions, I won’t trust myself to be that accurate with a pistol under distress. I have had unpleasant experience of having to get my gun out in the middle of the night under those circumstances. Let me tell you that my vision and judgment was totally fucked going from deep sleep to oh shit mode instantly. Fortunately it was a false alarm. However, the alarm woke my kids and had them wondering around to investigate. You just never know the situation you’ll face until it happens. However I digress. There are also tactical locks for shotguns as well. I have one from shotlock. https://www.shotlock.com/. I configure it to hang from the breach. With the breach open, there is no way it can accidentally fire.