The account, worth £750,000, requires All Response Media to handle a national press ad campaign to drive customer acquisition, with the campaign breaking this week.
Having raised finance of more than £5m in April 2007, the Cambridge-based AlertMe home security system uses broadband and mobile technology to secure properties.
In November, All Response Media picked up the brief to handle online gambling outfit 888.com's promotion on taxi sides in a three-month campaign with Taxi Promotions UK.
In October, All Response Media North, the Leeds arm of the London-based agency, appointed Dan Mowbray to replace former head of digital Mark Varley.
Varley left All Response Media North for Mediaedge:cia Manchester last summer.