99 per month for its no contract monitoring service
, while Nest charges $29 per month. If you commit to a three year contract, the price of the Nest service drops to $19 per month. Ring's Protect Plus plan goes for $10 per month and doesn't require a contract. Monitoring for professionally installed systems tends to be more expensive. 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.