USDD vs United Stables — side-by-side comparison of supply, chains, backing, and peg data.
| Metric | USDD | U |
|---|---|---|
| USD circulation value | $1.51B | $1.08B |
| Rank (by USD value) | #13 | #16 |
| Peg | USD | USD |
| Mechanism | crypto-backed | crypto-backed |
| Backing | Algo + TRX collateral | Stablecoin basket |
| Chains deployed | 4 | 3 |
| Primary chain | Tron | BSC |
| Issuer | USDD | United Stables |
| CoinGecko | View → | View → |
Both USDD and U track USD, but they differ in backing and issuer. USDD is backed by algo + trx collateral while U is backed by stablecoin basket. As of today, USDD ranks #13 and U ranks #16 among tracked stablecoins.
USDD is larger, with $1.51B in circulation vs $1.08B for U. That's roughly 1.4× the size.
Neither USDD nor U is inherently "safer" — safety depends on the specific backing composition, issuer transparency, redemption rights, and regulatory oversight. USDD uses crypto-backed backing model; U uses crypto-backed. Users should read each issuer's most recent reserve attestation before choosing.
Yes. USDD and U both trade on major centralized and decentralized exchanges. Since both track USD, the exchange rate is typically very close to 1:1. Direct swap protocols on Ethereum, Solana, and other chains offer the tightest spreads.
The right choice depends on your use case. Consider: which chain do you need? USDD is available on 4 chains and U on 3. What backing do you prefer? What's your integration surface (exchanges, DeFi protocols, payment providers)? Both have deep liquidity, so market cap alone shouldn't decide it.