Data aggregated by Dune suggests that the leading stablecoins, Tether's USDt (USDT) and Circle's USDC, are increasingly functioning as specialized financial instruments tied to specific blockchains, rather than engaging in direct competition.

According to Dune’s Digital Asset Brief, USDT holds a commanding lead in on-chain commercial payments. Over the initial half of 2026, USDT facilitated approximately $95 billion in recognizable commerce transactions, significantly outpacing USDC's $14 billion share. Furthermore, USDT represented about 92% of the total business-to-business payment volume, which amounted to $48 billion. This payment-centric role is further evidenced by USDT's primary network, Tron, where roughly 93% of the token supply is held in standard user wallets, rather than being held on exchanges, thus emphasizing its utility for remittance and payments.

Conversely, USDC has carved out its dominance within decentralized finance (DeFi). In June, USDC activity on the Base network registered nearly $2.6 trillion in transfer volume, setting a record for any token-chain pairing. This was supplemented by another $1.6 trillion in volume handled by USDC on the Ethereum network.

These findings indicate that the typical comparison pitting USDT against USDC is becoming less relevant. Instead, each stablecoin is successfully establishing its own distinct market niche: USDT leads in payments, while USDC serves as the essential backbone for much of the trading and DeFi operations in the crypto space.

These divergent roles emerge while the two digital assets maintain control over the overall stablecoin market. Dune, which monitored above 200 stablecoin tokens distributed across various blockchains, reported that USDT and USDC conjointly represent roughly 83% of the sector’s total market capitalization, valued near $315 billion.

The broader stablecoin industry has experienced heightened focus in the United States following the enactment of the GENIUS Act. This legislation, signed into law in 2025, established the very first federal regulatory framework specifically for payment stablecoins, thereby enabling banks and various corporations to issue digital assets pegged to the US dollar.

Lawmakers are currently considering the CLARITY Act, a separate piece of legislation intended to define the broader market structure for digital assets. This act aims to clarify whether crypto assets fall under the purview of the US Securities and Exchange Commission or the US Commodity Futures Trading Commission. Although the CLARITY Act does not directly regulate stablecoins, its passage would significantly influence the regulatory atmosphere affecting exchanges, DeFi platforms, and stablecoin issuers generally. The CLARITY measure advanced out of the Senate Banking Committee during May. However, its prospects for a full Senate vote prior to the August recess are now estimated by Galaxy at 50%, as legislative timelines are becoming increasingly compressed.