LINE's Web3 Super-App: Unify Aims to Dominate Asian Stablecoin Market

LINE NEXT and Kaia DLT Foundation Launch Project Unify

LINE NEXT, in collaboration with the Kaia DLT Foundation, has unveiled plans for Project Unify, a Web3 super-app leveraging stablecoins. The platform is slated for beta release later this year.

Unify will function both as a standalone Kaia-powered application and as a Mini Dapp within the LINE Messenger app. The core idea is to consolidate stablecoin yield opportunities, payments, remittances, fiat on/off-ramps, decentralized finance (DeFi), and various consumer Web3 applications into a single hub.

Asia's Stablecoin Race Heats Up with Payments-Focused Unify

This launch reflects a broader trend of embedding digital finance solutions into existing, widely-used consumer platforms. Rather than requiring users to download yet another wallet, Unify integrates directly into LINE Messenger, a prevalent app across Asia.

“We have seen both the needs and the potential of stablecoins. We plan to lead the expansion of Asia’s stablecoin ecosystem by introducing a super-app that anyone can use easily and safely.”
— Youngsu Ko, CEO, LINE NEXT

Key Features of Unify

• Real-time “Easy Saver” Rewards: Users can deposit stablecoins and earn instant yield.
• Unify Visa Card: Offers up to 5% payback on purchases.
• Global Stablecoin Payments: Supported at online and offline merchants.
• Fast P2P Transfers: Peer-to-peer transactions via LINE messages in under a minute.

The service aims to lower barriers to entry with broad on/off-ramp support for seamless transitions between fiat and stablecoins. Beyond payments, Unify plans to host over 100 Web3 applications, including DeFi platforms, NFT marketplaces, and games, with additional incentives for user engagement.

LINE NEXT and Kaia reported significant user acquisition from testing Mini Dapps on LINE Messenger in January 2025, drawing in over 130 million new registered users. Leveraging LINE’s 194 million monthly active users in Japan, Taiwan, and Thailand, Unify aims to establish itself as a comprehensive consumer platform.

Regional Stablecoin Integration and SDK Expansion

Unify is designed to aggregate regional stablecoins into a unified framework, supporting tokens pegged to various Asian currencies, including the US dollar, Japanese yen, Korean won, Thai baht, Indonesian rupiah, Philippine peso, Malaysian ringgit, and Singapore dollar. Kaia envisions Unify as a central coordination layer for stablecoin issuance, payments, and yield generation across Asia.

LINE NEXT and Kaia will release a Unify SDK to allow stablecoin issuers and developers to broaden their reach. This SDK will enable issuers to distribute tokens across borders and developers to integrate payment and yield functionalities into their applications. The goal is to boost liquidity and expand utility within regional markets.

Unify is designed to adapt to local regulatory requirements. By connecting with LINE’s Dapp Portal, the service can tailor features to comply with specific jurisdictions within Asia's diverse legal environment.

“Project Unify is Kaia’s strategic project to seize the opportunity in dominating the Asian stablecoin market… Another core element is the stablecoin orchestration layer—Asia’s payment infrastructure remains highly fragmented, and Kaia is uniquely positioned to consolidate it and drive cross-border financial inclusion.”
— Dr. Sam Seo, Chairman, Kaia DLT Foundation

Competing Visions: Unify vs. Coinbase’s Base App

Coinbase is also developing a super-app through its Base App, which integrates trading, payments, messaging, and social features on its Layer 2 Base network. It incorporates AI agents, NFC-enabled USDC payments, and “Flashblocks” technology for faster transaction speeds.

Dr. Sam Seo of Kaia DLT Foundation emphasized the differences between Unify and Coinbase’s approach.

“Built on Kaia’s layer 1 blockchain, Unify integrates stablecoin remittances, payments, DeFi, DEX, and mini apps for games and NFTs into a messenger people already use every day. Unify’s comprehensive Web3 platform with DEX and DeFi is accessible through a leading messaging app, LINE Messenger, for the first time in the Asian Web3 market.”
— Dr. Sam Seo, Kaia DLT Foundation

Seo highlighted that while Coinbase’s Base App originated from its exchange and wallet services in Western markets, Unify is built upon the foundation of LINE Messenger. This allows Unify to potentially reach hundreds of millions of users and serve as a coordination layer for regional stablecoins.

Unify also plans to expand beyond Kaia's USDT to include stablecoins pegged to various Asian currencies.

“Using LINE’s reach and Kaia’s network, Unify plans to combine regional stablecoins into a single super-app experience. Powered by Kaia’s stablecoin orchestration layer, Unify delivers payments, DeFi, and everyday financial services seamlessly through LINE Messenger.”
— Dr. Sam Seo, Kaia DLT Foundation

These initiatives illustrate two distinct strategies: Coinbase focuses on speed and social finance for Western markets, while LINE NEXT and Kaia prioritize compliance, payments, and Asian regional currencies. Both aim to shape the future of Web3 consumer applications, but they are starting from different positions.

Regulatory Landscape and Market Implications

Unify’s emphasis on payments aligns with evolving regulatory scrutiny of digital finance. Regulatory bodies are increasingly focusing on digital assets and stablecoin issuers.

Dr. Sam Seo previously emphasized the importance of developing local-currency stablecoins in Asia to counterbalance the growing influence of USD-backed tokens. He also suggested that a multi-currency stablecoin alliance could improve cross-border liquidity and enhance regional financial autonomy.

In Asia, where payment systems are fragmented, Unify’s orchestration model could prove particularly valuable. By providing compliant and interoperable infrastructure, Unify has the potential to improve cross-border financial access for both consumers and institutions.

The success of these super-app initiatives will depend on which approach—performance-driven social finance or compliance-focused payments integration—resonates more strongly with mainstream users. For companies navigating the evolving regulatory landscape and seeking to establish a secure and compliant presence in the Web3 space, services like Codeum's smart contract audits can be invaluable in ensuring the reliability and security of their platforms.