Tether and Circle Maintain Stablecoin Market Dominance

The stablecoin sector is characterized by a duopoly, as Tether’s USDT and Circle’s USDC account for roughly 85% of the total market. Out of a total market capitalization of approximately $302.9 billion, these two entities represent about $257.7 billion in circulating supply.

Tether’s USDT holds a 60.5% market share with a supply of approximately $183.4 billion, while Circle’s USDC accounts for 24.5% with a supply of around $74.3 billion. The market concentration is reflected in a Herfindahl-Hirschman Index of approximately 4244, which exceeds the 2500 threshold typically used to define a highly concentrated market.

Other stablecoins, including DAI, Ethena’s USDe, and World Liberty Financial’s USD1, maintain individual market shares generally below 3-4%.

While USDT maintains a larger supply and is widely used for peer-to-peer transfers and as a dollar substitute in emerging markets, USDC captures between 60% and 70% of on-chain transaction volume. USDC is frequently utilized by DeFi protocols and institutional participants, supported by regular reserve attestations. In August, USDC experienced weekly inflows of approximately $1.5 billion, contributing to a recovery in total market capitalization.

The scale of the stablecoin market suggests that any disruption to Tether or Circle could impact traditional money markets, given that reserves are held in bank deposits and Treasury bills. The two companies have adopted distinct strategies, with USDT focusing on global availability and USDC emphasizing regulatory compliance.