The ADT Pulse monitoring service starts at $28. 99 per month and requires a three
year contract, but you also have
to figure in the cost of things like hardware components, cellular backup, and installation. When we reviewed the Pulse system, our upfront cost was more than $3,000, with a monthly fee of over $60. Some vendors, such as LifeShield, will let you buy the components outright or lease them. For example, LifeShield's Security Essentials system will cost you $29. 99 per month for three years and includes monitoring, but you'll pay a $99 activation fee and you don't own the equipment at the end of the lease.