ADT Review 2026: 151 Years in Business, 6 Million Customers — But Is ADT Worth $1,169 Over 3 Years When DIY Costs $515?

ADT charges $28-46/mo on 36-60 month contracts. Professional installation runs $99-199. Equipment is leased on some plans — cancel early and you may owe for hardware you cannot keep. 3-year total: $1,...