SimplySwitch will continue to operate independently with the management team on a three-year earn-out, but will be part of AND's Digital Publishing division, headed by Keith Perch.
SimplySwitch allows consumers to compare available products in energy, home phone, mobile, broadband and then change suppliers either online or over the phone.
Andy Hart, managing director of AND, said: "The fit with the other group assets is strong, and we expect the business to work closely with a number of the group's other businesses. SimplySwitch is also expanding its range of personal finance products, and will be a key component of AND's personal finance offering."