Depends a bit on your more specific use case / requirements and budget. Some require ongoing subscription costs. Some are harder to get your hands on if you aren't an authorized dealer. I dug up some links in another thread recently: Door lock system with keypadneed a door controller with wiegand keypad capability and pin numbers, anyone know a system that is not too expensive??
looked but cant find, they look like they are no longer in production?Dahua & Hikvision both make some less expensive access controller's that are probably better than some of the random Chinese brands on amazon.
what's your budget?anyone know a system that is not too expensive?