The testing will take place in its Barnard Marcus, William H Brown, Fox & Sons and Brown & Merry branches.
raterAgent already works with Webbers, Marsh & Parsons, Keatons and Anthony Pepe after it launched in ‘beta testing’ four months ago following a successful crowdfunding campaign.
Mal McCallion, chief executive of raterAgent, said: “We’re delighted that such a significant agency as Connells Group has joined us.
“raterAgent is not just about driving new early-stage valuation requests, we want to make that new business as profitable as possible.
“Nothing convinces a potential seller or landlord that an agent is worth a higher fee than seeing people, just like them, talking on an independently-verified site about the great service they received.
“We’re focused on delivering on that for all of our clients and are thrilled that this now includes Connells Group.”