I have already named a few in the list. But the question is a bit subjective, as there are hundreds of great companies that create rat traps. However, my favorites are:
Victor Company makes the deadliest and most effective traps from durable materials. Check out their electric traps, they are totally worth their money;
Catchmaster makes removable and savvy traps. I like glue trays the most because I can fold them into the shape I need;
Kensizer offers the most humanized way to get rid of rats. If you don’t want to kill them, you can trap them and let them go somewhere far from your home or some other people’s houses.