Coupang, South Korea's largest e-commerce platform, has announced plans to launch its own mobile payment service, "Rocket Pay", in the second half of 2026. With a cumulative membership base of more than 30 million, the company's entry into the payments market sets the stage for a direct confrontation with established players such as Naver Pay, Kakao Pay, and Toss.
Bringing payments in-house: the super-app play
Coupang's move into payments is not mere diversification — it is the centrepiece of its super-app strategy. The company has steadily built out its financial infrastructure through Rocket Delivery, Coupang Eats, Coupang Play, and Coupang Payments. Rocket Pay is designed to serve as the "payment hub" that binds this entire ecosystem together.
Industry observers point to the sheer scale of Coupang's proprietary data. The platform accumulates the spending patterns, delivery cycles, and purchase histories across categories of roughly 30 million monthly active users. Combining that trove with transaction data could open the door to deeper fintech services: credit scoring, bespoke financial products, and personalised lending.
Is the market already saturated?
According to the Bank of Korea, the average daily transaction volume for mobile payment services exceeded 20 million in 2025, with growth remaining steady. Yet the top of the market is already firmly entrenched. Naver Pay holds approximately 35% of the online payments market, with Kakao Pay and Toss trailing behind.
Optimists point to the loyalty embedded in Coupang's closed ecosystem as a key advantage. More than 14 million users subscribe to its paid Rocket Wow membership, and most of their spending already flows through the Coupang app. Analysts suggest that if Rocket Pay is bundled with Rocket Wow benefits, it could achieve initial user adoption faster than any rival has managed.
Sceptics are not so easily convinced. "Dominating payments inside Coupang's own platform is an entirely different challenge from expanding into offline retail and third-party platforms," said one fintech industry insider. "Naver Pay succeeded because it secured hundreds of thousands of external merchants." Without a comparable merchant network, Rocket Pay risks being dismissed as a half-measure — useful within the Coupang walled garden, but little more.
Global precedents: Amazon, Alibaba, and Walmart
Coupang's trajectory mirrors that of the global e-commerce giants. Amazon Pay extended its reach beyond Amazon's own marketplace to third-party retailers. Alibaba's Alipay grew into China's dominant payments platform and ultimately spawned Ant Group, an independent fintech empire. Walmart Pay, by contrast, improved the in-store checkout experience but failed to expand meaningfully beyond its own outlets, leaving it regarded as a payment tool for internal use only.
Which model Coupang follows is the pivotal question. Given the scale of the company's gross merchandise volume (GMV) in South Korea, there is a clear incentive to pursue an Amazon Pay-style external expansion — but doing so would require additional licences from financial regulators and the considerable expense of signing up merchants at scale.
Regulatory hurdles and the incumbents' response
Rocket Pay must first clear the regulatory gates. Coupang Payments has already registered as an electronic financial business, but the full launch of a mobile payment service may trigger additional licensing requirements, including the issuance and management of prepaid electronic instruments. The Financial Services Commission's ongoing deliberations on expanding oversight of big-tech firms in financial services add a further layer of uncertainty.
The incumbents are not standing still. Naver Financial is deepening its AI-driven personalised payment recommendations; Kakao Pay is expanding its offline merchant base and broadening into insurance and investment products; and Toss is accelerating its transformation into a comprehensive financial platform spanning banking, brokerage, and insurance.
What changes for consumers and small businesses?
For consumers, intensifying competition will most likely translate into better rewards — higher points accrual, cashback offers, and interest-free instalment plans. There are, however, concerns about the "lock-in" effect of tying yet another layer of daily life to the Coupang ecosystem.
For small businesses and marketplace sellers, transaction fees are the critical issue. If Coupang designs its own fee structure through Rocket Pay, its negotiating leverage over card networks and payment gateway providers will shift considerably. Some sellers are already worried. "If Coupang monopolises our payment data as well, our dependence on the platform will only deepen," one merchant warned.
Outlook: a watershed moment for South Korean payments
Rocket Pay is not simply another product launch. It is the final piece in Coupang's super-app puzzle — the link connecting e-commerce, logistics, content, payments, and financial services into a single platform. Whether it succeeds will depend on the benefits synergy with the Wow membership, the speed at which external merchants can be recruited, and the company's relationship with regulators.
Analysts broadly agree that Rocket Pay will quickly capture a large share of transactions within Coupang's own platform in the short term. But if the service cannot prove its worth outside that perimeter over the medium to long term, it is unlikely to fundamentally redraw the competitive map. The second half of 2026 looks set to mark the beginning of a genuine "big bang" era in South Korea's mobile payments market — one whose ultimate winners remain far from certain.