DAIvsUSDD
Dai vs USDD — side-by-side comparison of supply, chains, backing, and peg data.
Side-by-side
DAI — Dai
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 DAI supply moved -1.6% and USDD +7.9% — USDD grew faster. DAI held the tighter band: worst deviation 4 bps against 29 bps.
Key differences
- DAI is roughly 3.2× larger than USDD by USD circulation value ($4.79B vs $1.51B).
- DAI ranks #4 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.
- Both are crypto-backed stablecoins, so the mechanism is not what separates them.
- Reserves differ — DAI holds overcollateralized crypto cdp, USDD holds algo + trx collateral.
- DAI is deployed on 49 chains — much broader coverage than USDD's 4.
- Primary chain differs — most DAI supply lives on Ethereum, while most USDD supply is on Tron.
Full comparison table
| Metric | DAI | USDD |
|---|---|---|
| USD circulation value | $4.79B | $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 | Sky (formerly MakerDAO) | TRON DAO Reserve |
| CoinGecko | View → | View → |
Frequently Asked Questions
What's the main difference between DAI and USDD?
Both track USD, so they compete for the same use cases. DAI holds overcollateralized crypto cdp; USDD holds algo + trx collateral. DAI ranks #4 by USD value and USDD ranks #13.
Which is bigger, DAI or USDD?
DAI is larger, with $4.79B in circulation vs $1.51B for USDD. That's roughly 3.2× the size.
Is DAI 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. Both use a crypto-backed model, so the difference sits in the issuer and the reserves rather than the design. Read each issuer's most recent reserve attestation before choosing.
Can I convert between DAI and USDD?
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.
Should I choose DAI or USDD?
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.