We started using RTB house in 2019 for our retargeting efforts, with the goal of driving our CPA as low as possible by using custom bidding strategies. As our advertising strategy became more ROI-driven, we were able to make better use of our budget thanks to the personalization and effectiveness of Deep Learning algorithms.

Jesslyn Kwong, VP Digital Performance & Solutions, 99.co


CPA efficiency compared to the client’s goal


of total site inquiries delivered


increase in inquiries for verified listings

99.co is a leading real estate technology company that operates real estate portals across South East Asia, specialising in digital property advertising. With their headquarters in Singapore, they are also operational in Indonesia and generate over 20 million visits to their website per month.


Having already worked with other retargeting providers before engaging the service of RTB House, 99.co faced the challenge of generating more inquiries with a stable and ideal Cost per Acquisition (CPA). In addition, they were also aiming to increase the volume of inquiries for certain listing categories, namely: Sale and Verified listings. Verified listings are those proven by their team to be authentic and not duplicated.


RTB House proposed a Deep Learning-powered retargeting campaign based on its expertise in the real estate classifieds vertical, focusing on users most likely to convert. Highly personalised creatives would be utilised based on listings that the users were interested in. The users would be segmented and targeted using different sub-campaigns, with a focus on Sale and Verified listings. The campaign was optimised continuously to maximise the volume of inquiries and to deliver the most efficient CPA.


The implementation of RTB House’s personalized solutions generated impressive results for 99.co. Based on the results delivered along with a proactive customer focussed approach, RTB House became the first choice retargeter for 99.co.

  •  2x CPA efficiency compared to the client’s goal

  •  Proportion of conversions is up by 20% of the total inquiries received by 99.co.

  •  Over 10x increase of inquiries for Verified listings

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