Coinone

Coinone is one of South Korea's longest-running and largest centralized cryptocurrency exchanges, operational since 2014. Founded by Myunghun Cha, a cybersecurity specialist and self-described white-hat hacker, Coinone was built on the premise of bringing blockchain technology into mainstream financial life — a mission captured in its tagline, "Bring Blockchain into the World." It operates primarily as a Korean Won (KRW) on-ramp and off-ramp, serving South Korean retail and institutional users who wish to trade, stake, or earn rewards on digital assets including Solana (SOL).

What Coinone Does

At its core, Coinone is a spot exchange offering over 250 cryptocurrencies, all paired with KRW. There is no USD pairing and no leverage or futures trading — a deliberate design choice that keeps the platform focused on compliant, straightforward spot trading for the domestic Korean market. Deposits via domestic bank transfer are free; spot trading carries a flat 0.2% fee for standard users, with maker fees ranging from 0% to 0.1% and taker fees from 0.02% to 0.1% based on volume tiers.

Beyond trading, Coinone operates three complementary product lines:

Coinone Plus is the exchange's staking and delegation service. Users can deposit supported proof-of-stake assets, including Solana, and receive daily reward distributions without managing validators themselves. Solana staking through Coinone Plus offers annualized percentage rates (APR) of up to approximately 6.97%, according to platform data. Ethereum staking is offered in a liquid variant that allows users to trade staked representations without waiting for standard unstaking delays.

Zenport Robo Advisors is an automated trading service that executes portfolio strategies on behalf of users, lowering the barrier to systematic investing for retail participants who lack the time or expertise to manage positions manually.

Open API provides developer access to Coinone's trading infrastructure through a versioned REST API and WebSocket endpoints (both public and private). The API supports real-time chart data, order management, fee queries, and rewards-event integrations, enabling third-party applications and bots to connect to Coinone's liquidity. Documentation is maintained at docs.coinone.co.kr and has received regular version updates through v1.7 as of mid-2026.

Solana Ecosystem Role

Coinone is a key regulated fiat gateway for Solana in South Korea. It allows Korean users to purchase SOL directly with KRW through a compliant, KYC-verified account, providing a straightforward path from the Korean banking system onto the Solana network. The exchange's custodial staking product means users can hold and earn yield on SOL without leaving the regulated exchange environment, which appeals to conservative or compliance-conscious investors.

Coinone does not have documented integrations with Solana DeFi protocols, liquid staking tokens such as mSOL or JitoSOL, or on-chain programs. Its Solana exposure is centralized and custodial rather than protocol-native.

Ownership, Investment, and Financials

In May 2026, Coinone announced a landmark $106 million investment, with Korea Investment & Securities and OKX Ventures each acquiring approximately 19.6% stakes in the company. The transaction — structured as a combination of secondary share purchases and new share issuances — valued Coinone at between 500 and 600 billion won (roughly $375 to $450 million USD). CEO Cha Myunghun retained the largest individual stake at 27.8%, with Com2uS Holdings holding approximately 25%.

The strategic rationale for both investors centers on expanding into stablecoins, tokenized real-world assets, and institutional crypto services. Korea Investment & Securities, South Korea's largest brokerage by revenue, brings compliance infrastructure, AML systems, and regulatory relationships. OKX Ventures contributes international exchange operations expertise, security practices, and institutional trading infrastructure. The partnership positions Coinone as a bridge between South Korea's traditional financial sector and the broader crypto economy.

Regulatory History

Coinone is registered as a Virtual Asset Service Provider (VASP) under South Korea's regulatory framework administered by the Financial Intelligence Unit (FIU). It has maintained that registration since the country's VASP requirements took effect, distinguishing it from unregistered foreign exchanges that operate without local compliance obligations.

In April 2026, the FIU imposed a fine of 5.2 billion won (approximately $3.5 million USD) and ordered a three-month partial business suspension after an on-site inspection identified systemic AML failures: approximately 70,000 cases of inadequate user verification and more than 10,000 transactions involving 16 unregistered foreign exchanges. The partial suspension, which would have prevented new customers from making deposits, withdrawals, or external virtual asset transfers, was scheduled to run from April 29 to July 28, 2026. Existing account holders retained access to trading, KRW deposits, and KRW withdrawals throughout.

Coinone challenged the suspension in the Seoul Administrative Court, filing both an administrative lawsuit and an emergency stay of execution. In May 2026, the Seoul court issued a ruling blocking enforcement of the business suspension, allowing the exchange to continue onboarding new users while the legal case proceeds.

The exchange has also faced other legal and reputational episodes. In 2023, a token-listing bribery scandal implicated internal processes for selecting which projects to list. In 2025, Coinone won a court ruling related to double Bitcoin withdrawals that occurred during network congestion in 2017 and 2018. Despite these events, the platform has reported no external security breaches since its 2014 founding, a record it attributes to its two-factor authentication requirements and multi-signature wallet architecture.

Market Position

Daily spot trading volume on Coinone fluctuates between roughly $50 million and $300 million, positioning it as a significant but not dominant exchange by global standards. Within South Korea, it competes primarily with Upbit and Bithumb, both of which hold larger domestic market shares. Coinone's differentiation rests on its developer API, its staking product lineup, and, increasingly, its institutional ambitions facilitated by the Korea Investment and OKX partnership.

The exchange's mobile application is available on iOS and Android and serves as the primary interface for retail users. Mandatory KYC verification applies to all accounts, and KRW withdrawal limits are capped at 100 million KRW per account. The platform does not support international users outside South Korea in any material capacity due to its KRW-only trading structure.