USDTvsUSDD
Tether vs USDD — side-by-side comparison of supply, chains, backing, and peg data.
Side-by-side
USDT — Tether
USDD — USDD
30-day peg stability dotted line = target · both charts share one scale
What the last 30 days show
Over the last 30 days USDT supply moved -0.6% and USDD +7.9% — USDD grew faster. USDT held the tighter band: worst deviation 14 bps against 29 bps.
Key differences
- USDT is roughly 121.5× larger than USDD by USD circulation value ($183.08B vs $1.51B).
- USDT ranks #1 while USDD ranks #13 among all tracked stablecoins.
- Both are pegged to the same currency (USD), so they compete directly for the same use cases.
- USDT is a fiat-backed stablecoin; USDD is crypto-backed. Different mechanism, different failure modes.
- Reserves differ — USDT holds cash & t-bills, USDD holds algo + trx collateral.
- USDT is deployed on 130 chains — much broader coverage than USDD's 4.
Full comparison table
| Metric | USDT | USDD |
|---|---|---|
| USD circulation value | $183.08B | $1.51B |
| Rank (by USD value) | #1 | #13 |
| Peg | USD | USD |
| Mechanism | fiat-backed | crypto-backed |
| Backing | Cash & T-bills | Algo + TRX collateral |
| Chains deployed | 130 | 4 |
| Primary chain | Tron | Tron |
| Issuer | Tether Limited | TRON DAO Reserve |
| CoinGecko | View → | View → |
Frequently Asked Questions
What's the main difference between USDT and USDD?
Both track USD, so they compete for the same use cases. USDT holds cash & t-bills; USDD holds algo + trx collateral. USDT ranks #1 by USD value and USDD ranks #13.
Which is bigger, USDT or USDD?
USDT is larger, with $183.08B in circulation vs $1.51B for USDD. That's roughly 121.5× the size.
Is USDT safer than USDD?
Neither is inherently safer. Safety turns on reserve composition, issuer transparency, redemption rights and regulatory oversight — none of which this page audits. USDT uses a fiat-backed model; USDD uses a crypto-backed one. Read each issuer's most recent reserve attestation before choosing.
Can I convert between USDT and USDD?
Yes. USDT and USDD 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.
Should I choose USDT or USDD?
The right choice depends on your use case. Consider: which chain do you need? USDT is available on 130 chains and USDD on 4. 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.