Toss Partners with Optimism to Develop Future KRW Stablecoin

Highlights: 

• Toss has sealed a partnership deal with Optimism and Sunnyside Labs to improve South Korea’s payment system.
• The companies will run a three-month technology test to identify ideal blockchains for the infrastructure services.
• Part of the agreement also involves feasibility studies to determine if blockchain systems can support KYC and AML requirements. 

Viva Republica, the company behind Toss, a fintech and payment services firm, has partnered with blockchain companies Optimism and Sunnyside Labs to study whether blockchain technology can support Korea’s future digital payment system. Toss announced the partnership today after the companies signed a Memorandum of Understanding (MoU) to improve South Korea’s payment system.

Their first task is to execute a three-month technology test to assess the feasibility of using Optimism’s OP Stack as part of blockchain infrastructure for financial services in South Korea. Another important part of the project is the possibility of launching a Korean won-backed stablecoin. 

The companies will also study how blockchain can be used to support payment and settlement systems. They will also ensure that these payment systems comply with the strict regulatory standards for banks and other financial institutions.  Other important areas of interest include assessing whether financial institutions can retain direct control of payment and settlement activities rather than handing control to third parties.

The companies will also conduct feasibility studies to determine if blockchain systems can support identity verification (KYC) and anti-money laundering (AML) requirements. In addition, they will check if transaction data can remain private and secure while operating on a public blockchain network.

Toss Partners with Global Blockchain Firm to Validate KRW-Based Stablecoin Infrastructure

– Toss is exploring the feasibility of developing a KRW-pegged stablecoin in collaboration with Optimism and Sunnyside Labs.

– Leveraging its user base of approximately 30 million… https://t.co/tUzThurK7e

— Layergg (@layerggofficial) July 7, 2026

Significance of the Partnership for Toss

Toss stated that the ongoing project conducted in partnership with other companies will help ascertain if blockchain technology can play a larger role in its financial services over time. If the results are positive, the company could consider using blockchain in payment and settlement services, including those involving a won-pegged stablecoin. 

Toss has already established itself as a leading payment firm in South Korea’s financial market, with roughly 30 million users. In addition, the company has built over 500,000 online and offline payment locations. Its broad financial services include investments, payments, insurance, and banking services through related businesses such as Toss Bank. 

As Toss continues to expand, it wants to integrate blockchain into its existing financial products to support digital payment services. Kim Kyu-ha, the Chief Business Officer at Toss, said blockchain can only become part of mainstream finance if it follows financial regulations and protects users’ personal information.

Kim Kyu-ha stated:

“For Web3 technology to be successfully integrated into institutional finance, strict regulatory compliance and strong privacy protection are essential. We will verify the feasibility of building compliance-based digital financial infrastructure optimized for the Korean market using the OP stack.”

Interest in Blockchain Technology Continues to Grow as Toss Partners with Optimism

The latest partnership builds on the Toss ecosystem’s growing interest in blockchain technology. In June, Crypto2Community announced that Toss Bank partnered with the Solana (SOL) Foundation to test blockchain-based global remittances. Toss Bank described the collaboration as the first direct one-to-one strategic partnership between the Solana Foundation and an internet-only bank.

🚨JUST IN: KOREA'S TOSS BANK PARTNERS WITH SOLANA TO USE CRYPTO RAILS FOR REMITTANCES

Toss Bank, managing 30T won, signed a deal with Solana to use blockchain for remittances, including stablecoin transfers, for its 15 million customers.

Toss is now the first South Korean… pic.twitter.com/qu7PYKOrNp

— Coin Bureau (@coinbureau) June 22, 2026

The main significance of the partnership is to identify how to make cross-border transactions faster and cheaper, using blockchain technology and stablecoins. It also involves running a proof of concept for global remittance and settlement infrastructure on Solana. These partnerships come as South Korea continues to update its regulatory guidelines for digital assets. 

Part of the regulatory modification involves seizing and selling cryptocurrencies in civil cases. The country’s Financial Services Commission (FSC) is also cracking down on unregistered crypto platforms and has warned South Koreans to exercise caution when using platforms promoted on social media, online communities, and overseas websites.