FirstClick will become part of Performics Worldwide, ZenithOptimedia’s global performance marketing network.
It will be known as Performics Australia. Grace Chu, the chief executive, will remain at the company and join the Performics global executive leadership team.
Performics was launched in the UK in 2012. The company’s services include search engine marketing, social media, affiliate marketing and data analysis.
FirstClick was founded in 2005, and its headquarters are based in Sydney. The company provides clients with search engine marketing, search engine optimisation, programmatic buying, social marketing, marketing analytics and conversion rate optimisation.
Michael Kahn, the chief executive at Performics Worldwide, said: "We have been very impressed with the quality of FirstClick's offering and the results it is delivering to its clients are truly exceptional by global standards.
"The combination of Performics, a global leader in performance marketing with FirstClick, a market leader in Australia will provide clients with a combination of global best practice and strong local knowledge.
"We are confident that together we will be very well positioned to service the growing digital opportunity in Australia."