Lotte Members, operator of retailer Lotte Group’s membership reward service, said Thursday that it will be joining the Kiwoom Bank consortium, along with its convenience store affiliate 7- Eleven Inc.

“Based on our experience of operating the L Point membership system, we shall work (with Kiwoom Bank) to find ways of expanding financial benefits for our customers,” the company said in a press release.

Consisting of some 30 players, mostly involved in finance, telecommunications and retail, the Kiwoom consortium aims at creating an “open financial platform” for both customers and business operators.

“Our composition diversity allows us to expand the horizons of the internet-only bank sector and to suggest a new business model,” said an official representing the consortium.

Viva Republica also held a press conference explaining Toss Bank’s strategy and vision to become a “challenger bank” in the market.

“Toss was the first entity to pool an individual’s financial information, including bank accounts and payment records, into a single platform. With such comprehensive data, I believe we can finally find an adequate way to serve ‘thin filer’ consumers,” said CEO Lee Seung-geun.

Thin filers are people with limited credit histories who find it difficult to get loans. According to Lee, Korea currently has an estimated 12 million to 18 million people in this category who could benefit from Toss Bank’s envisioned services.

Until now, traditional banks could not accurately assess a thin filer’s credit score due to a lack of comprehensive data on his or her financial assets, income, spending and so on. Because of that blind spot in the system, they often had to take out high-interest personal loans or ask a third party to guarantee their loans.

Toss Bank’s idea is to leverage the individual financial and payment data collected via the Toss app, as well as through its strategic partners -- online fashion store Musinsa, real estate app Zigbang and e-commerce platform Cafe24 -- to build a credit scoring system backed by hard data.

In response to skepticism over the consortium’s ability to finance Toss Bank, Lee said it should not be a problem, despite its startup status and the greater capital held by its securities-led rival. After all, Lee said, Viva Republica has sufficient cash reserves on its own to run the new bank, and its other shareholders are big-name players that can pitch in capital as needed.

The Toss Bank consortium consists of Viva Republica, which holds a majority stake of 60.8 percent; Korean strategic holders with a combined 19.9 percent stake; and foreign venture capital firms with a 19.3 percent stake.

The winner is expected to kick off business early next year, joining the two conventional internet-only banks, K-Bank and Kakao Bank. Though a maximum of two consortia are eligible for preliminary approval, the regulator has hinted that it may approve only one.

By Bae Hyun-jung and Sohn Ji-young (tellme@heraldcorp.com) (jys@heraldcorp.com)