Tether vs USDC

Key differences

Tether (USDT) and USDC are the two largest U.S. dollar stablecoins, and their similarity is the point: both are fiat-backed tokens designed to hold a one-dollar value, issued on many blockchains, and used as dollar substitutes across crypto markets. The differences lie in issuer, scale, and regulatory posture rather than basic design.

USDT is issued by Tether and is the larger of the two by a wide margin, with over 183 billion tokens in circulation versus roughly 72 billion USDC. USDT dominates trading volume, particularly on offshore exchanges and networks like Tron, where it acts as the de facto quote currency. USDC, issued by the U.S.-based company Circle, has positioned itself around regulatory compliance — its categories include MiCA-compliant and GENIUS Act-compliant stablecoin designations — and is common in DeFi and among institutions favoring a regulated issuer.

Both exist on many chains, but their footprints differ. USDT is prominent on Tron, Ethereum, Solana, and TON, while USDC spans an especially broad set of networks including Ethereum, Solana, Base, Arbitrum, Stellar, and the XRP Ledger, and is native to Coinbase's Base ecosystem.

Neither token has a supply cap; each expands and contracts through minting and redemption against reserves. The practical distinction for users is counterparty and jurisdiction: the same dollar peg, maintained by different issuers with different reserve practices, regulatory oversight, and exchange relationships.