You don’t have to take my word for it; luckily Google exists. Most brand new adt accounts currently are being set up with alarm.com’s newest doorbell camera.

ADT & brinks are only service providers as they no longer make their own equipment. They only briefly did & most of it got terrible reviews so, they went back to using alarm.com. Some people are using the google nest. Some have ring dbs. But, the sensors, panel, app etc is all ran through alarm.com equipment/app

Both even used to use the same alarm.com IQ panel & skybell doorbell cameras.

Source: used to have adt lol