Answers
ADT - 3
reading this it seems best.
ADT is a very big company
well... I do like Brinks but ADT has better features and more people use ADT security systems and one more thing my freind works with ADT.
Brinks - 3
I'm speaking as a tech who has worked for all 3 companies over the years. Brinks was definitely the Best. They cared about the customers and the employees.Too bad they are long gone.Currently work for pro one and can't wait to leave. They are the opposite of what Brinks once was.
#1 in home security
it I think is the first security company