Sky Dollar vs Dai — side-by-side comparison of supply, chains, backing, and peg data.
| Metric | USDS | DAI |
|---|---|---|
| USD circulation value | $6.54B | $4.80B |
| Rank (by USD value) | #3 | #4 |
| Peg | USD | USD |
| Mechanism | crypto-backed | crypto-backed |
| Backing | Backed by DAI/USDC | Overcollateralized crypto CDP |
| Chains deployed | 7 | 49 |
| Primary chain | Ethereum | Ethereum |
| Issuer | Sky Dollar | Dai |
| CoinGecko | View → | View → |
Both USDS and DAI track USD, but they differ in backing and issuer. USDS is backed by backed by dai/usdc while DAI is backed by overcollateralized crypto cdp. As of today, USDS ranks #3 and DAI ranks #4 among tracked stablecoins.
USDS is larger, with $6.54B in circulation vs $4.80B for DAI. That's roughly 1.4× the size.
Neither USDS nor DAI is inherently "safer" — safety depends on the specific backing composition, issuer transparency, redemption rights, and regulatory oversight. USDS uses crypto-backed backing model; DAI uses crypto-backed. Users should read each issuer's most recent reserve attestation before choosing.
Yes. USDS and DAI 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? USDS is available on 7 chains and DAI on 49. 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.