USDSvsBUIDL
Sky Dollar vs BlackRock USD — side-by-side comparison of supply, chains, backing, and peg data.
Side-by-side
USDS — Sky Dollar
BUIDL — BlackRock USD
30-day peg stability dotted line = target · both charts share one scale
What the last 30 days show
Over the last 30 days USDS supply moved -11.1% and BUIDL +13.7% — BUIDL grew faster. BUIDL held the tighter band: worst deviation 0 bps against 4 bps.
Key differences
- USDS is roughly 2.5× larger than BUIDL by USD circulation value ($6.70B vs $2.71B).
- USDS ranks #3 while BUIDL ranks #10 among all tracked stablecoins.
- Both are pegged to the same currency (USD), so they compete directly for the same use cases.
- USDS is a crypto-backed stablecoin; BUIDL is fiat-backed. Different mechanism, different failure modes.
- Reserves differ — USDS holds backed by dai/usdc, BUIDL holds tokenized us treasuries (blackrock).
- Chain coverage is comparable: USDS on 7 chains, BUIDL on 8.
Full comparison table
| Metric | USDS | BUIDL |
|---|---|---|
| USD circulation value | $6.70B | $2.71B |
| Rank (by USD value) | #3 | #10 |
| Peg | USD | USD |
| Mechanism | crypto-backed | fiat-backed |
| Backing | Backed by DAI/USDC | Tokenized US Treasuries (BlackRock) |
| Chains deployed | 7 | 8 |
| Primary chain | Ethereum | Ethereum |
| Issuer | Sky | BlackRock (tokenized by Securitize) |
| CoinGecko | View → | View → |
Frequently Asked Questions
What's the main difference between USDS and BUIDL?
Both track USD, so they compete for the same use cases. USDS holds backed by dai/usdc; BUIDL holds tokenized us treasuries (blackrock). USDS ranks #3 by USD value and BUIDL ranks #10.
Which is bigger, USDS or BUIDL?
USDS is larger, with $6.70B in circulation vs $2.71B for BUIDL. That's roughly 2.5× the size.
Is USDS safer than BUIDL?
Neither is inherently safer. Safety turns on reserve composition, issuer transparency, redemption rights and regulatory oversight — none of which this page audits. USDS uses a crypto-backed model; BUIDL uses a fiat-backed one. Read each issuer's most recent reserve attestation before choosing.
Can I convert between USDS and BUIDL?
Yes. USDS and BUIDL 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 USDS or BUIDL?
The right choice depends on your use case. Consider: which chain do you need? USDS is available on 7 chains and BUIDL on 8. 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.