Zoopla delivered a 25% increase in applicant leads and a 17% uplift in valuation leads to agents in January 2020, compared to the same month last year.
The company also saw a 15% rise in online sessions.
Zoopla attributed the increase to a Boxing Day marketing campaign, though there have been reports of the market bouncing back in January.
Charlie Bryant, chief executive, Zoopla, said: “We’ve started the year with tremendous impact – both for our agent partners and for our business, and we are moving the needle in terms of brand preference.
“Undoubtedly, the scale of our marketing investment has galvanised market confidence, and set a new, upward trajectory for the year ahead. Results show that our campaign, which launched on Boxing Day, has engendered real cut-through with agents and consumers alike.
“With the backing of Silver Lake, we have been able to establish a new era for Zoopla, in which we double down on immediate agent need and priorities, easing the everyday pain points that might otherwise hamper their businesses, while also planning for the long term.
“The Zoopla advantage has unlocked value for agents in a way that other providers can’t, and we’ve generated genuine traction in regions where we had previously been underrepresented.
“2020 is set to be a game-changing year for us, and we look forward to partnering with more and more agents to help them realise their ambitions.”
Zoopla has increased its coverage of lettings listings in London from 58% to 71% year-on-year.