Macquarie Group (MQG) and ING Direct on Friday said they would...

Macquarie Group (MQG) and ING Direct on Friday said they would start using Apple Inc's mobile payment service in Australia this month, hoping to snatch market share from the major retail banks through digital technology.

So far only one of the major banks, Australia and New Zealand Banking Group (ANZ), has adopted the Apple Pay system, creating an opportunity for smaller rivals in a market dominated by the so-called Big Four lenders.

ING Direct and Macquarie have well-known brand names and national reach, giving them a potential leg up over similar-sized regional rivals like Bendigo and Adelaide Bank (BEN) and Bank of Queensland (BOQ) in attracting retail banking and mortgage customers with technology.

"In the context of the Big Four, it feels like the sector is ripe for disruption," Dominic Walsh, a managing director of branding firm Landor Associates, told Reuters.

“If you are a competitor like an ING or one of these other challenger entrants you need to provide a product that is superior.”

The major lenders ANZ, National Australia Bank Ltd (NAB), Commonwealth Bank of Australia (CBA) and Westpac Banking Corp (WBC) control about 80 percent of Australia's mortgage market and regulators are likely to welcome greater competition from smaller banks mobile banking platforms.

ING Direct and Macquarie, which each have less than 3 percent retail market share, both lack physical branch networks. That gives them a cost advantage over the Big Four but means they rely on digital channels and word of mouth.

In September, Macquarie introduced a smartphone banking app that took its design cues from products like Spotify and Facebook.

Macquarie Bank Head of Personal Banking Ben Perham said the introduction of Apple Pay, allowing customers to make payments with iPhones and Apple Watches, would further enhance the bank's digital offering.

“We’ve seen strong interest in Apple Pay from our customers and we’re delighted to confirm it will be available later this month," he said in a statement.

ING Direct Executive Director, Customers John Arnott said most of the Dutch-owned bank's 500,000 Orange Everday account customers preferred to connect through mobile devices.

"For many of them, their smartphone is their bank, and it's a natural extension that their iPhone will also become their wallet," he said in a statement.

ING Direct has operated in Australia since 1999, with an initial focus on high-interest savings accounts. The bank, which also offers mortgages, has plans to introduce new credit card and life insurance products.

Other banks, representing two-thirds of credit card issuers, have asked the competition regulator for permission to bargain collectively with Apple. A draft decision went against the banks, but a final decision has not been made.