Dai vs USDD — side-by-side comparison of supply, chains, backing, and peg data.
| Metric | DAI | USDD |
|---|---|---|
| USD circulation value | $4.80B | $1.51B |
| Rank (by USD value) | #4 | #13 |
| Peg | USD | USD |
| Mechanism | crypto-backed | crypto-backed |
| Backing | Overcollateralized crypto CDP | Algo + TRX collateral |
| Chains deployed | 49 | 4 |
| Primary chain | Ethereum | Tron |
| Issuer | Dai | USDD |
| CoinGecko | View → | View → |
Both DAI and USDD track USD, but they differ in backing and issuer. DAI is backed by overcollateralized crypto cdp while USDD is backed by algo + trx collateral. As of today, DAI ranks #4 and USDD ranks #13 among tracked stablecoins.
DAI is larger, with $4.80B in circulation vs $1.51B for USDD. That's roughly 3.2× the size.
Neither DAI nor USDD is inherently "safer" — safety depends on the specific backing composition, issuer transparency, redemption rights, and regulatory oversight. DAI uses crypto-backed backing model; USDD uses crypto-backed. Users should read each issuer's most recent reserve attestation before choosing.
Yes. DAI 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.
The right choice depends on your use case. Consider: which chain do you need? DAI is available on 49 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.