Stablecoins Cross $200B — USDT vs USDC: Who Wins?

Total stablecoin supply has crossed $200B for the first time. The USDT vs USDC rivalry is reshaping which chains dominate DeFi.

The stablecoin market has crossed $200 billion in total supply — a milestone that cements dollar-pegged assets as the backbone of global DeFi. Beneath the headline number, a fierce battle is playing out between Tether (USDT) and Circle (USDC).

USDT: The Dominant Force

Tether holds roughly 70% of the stablecoin market. Its dominance comes from being the first mover, available across 15+ networks, and deeply integrated with offshore exchanges. Critics point to reserve transparency issues, but trading desks have repeatedly voted with their volume.

USDC: The Regulated Challenger

Circle's USDC is the compliant alternative — backed by US Treasuries and cash, with monthly attestations. Since MiCA came into force in Europe, USDC has gained significant market share in EU-based DeFi protocols.

Why This Matters for Swapping

On Steyble's swap aggregator, the best rates between USDT and USDC depend on liquidity pool depth across chains. Bridging stablecoins cheaply — say from Tron to Arbitrum — is now one of the most valuable operations in DeFi.