There are also installed units that an electrician can put in for you. Generally located out by the breaker panel, they range from single circuit to whole system protection. I have had a few done on residences, and thousands on communications shelters, and like everything else you get what you pay for. (not always then)

I did not do a whole house system on my home at the time of construction (too expensive even at cost only), only dedicated circuits, and those are backed up with surge protectors at the appliance.

Good Luck