The companies unveiled Trust Bank -- owned 60% by the London-headquartered lender and the rest by Singapore-based supermarket FairPrice Group and its parent NTUC Enterprise -- that offers a savings account, credit card, and a family personal accident insurance.

While the local banking sector is dominated by brick-and-mortar giants DBS Group Holdings Ltd, OCBC, and United Overseas Bank Ltd that also offer digital banking services alongside some companies foraying into pure-play digital banking.

Singapore Telecommunications and Grab Holdings on Aug. 31 rolled out Singapore's first digital bank for the retail market, while China's Ant Group in June launched a digital wholesale bank, dubbed ANEXT Bank, incorporated in the city-state.

Standard Chartered, FairPrice, and NTUC Enterprise have invested S$400 million ($285 million) in Trust Bank. FairPrice is a part of NTUC Enterprise group of social enterprises.

NTUC Enterprise, meanwhile, is a part of Singapore's biggest trade union called the National Trades Union Congress. Other social enterprises under NTUC Enterprise own and operate shopping malls and pharmacies in the city.

($1 = 1.4014 Singapore dollars)

(Reporting by Yantoultra Ngui; Editing by Anshuman Daga and Uttaresh.V)