BUIDLvsOUSD
BlackRock USD vs Open USD — side-by-side comparison of supply, chains, backing, and peg data.
Side-by-side
BUIDL — BlackRock USD
OUSD — Open USD
30-day peg stability dotted line = target · both charts share one scale
What the last 30 days show
BUIDL held the tighter band: worst deviation 0 bps against 3 bps.
Key differences
- BUIDL is roughly 3.2× larger than OUSD by USD circulation value ($2.25B vs $698.8M).
- BUIDL ranks #11 while OUSD ranks #17 among all tracked stablecoins.
- Both are pegged to the same currency (USD), so they compete directly for the same use cases.
- Both are fiat-backed stablecoins, so the mechanism is not what separates them.
- BUIDL reports tokenized us treasuries (blackrock) in reserve. We do not track a published reserve breakdown for OUSD.
- BUIDL is deployed on 8 chains — much broader coverage than OUSD's 4.
- Primary chain differs — most BUIDL supply lives on Solana, while most OUSD supply is on Tempo.
Full comparison table
| Metric | BUIDL | OUSD |
|---|---|---|
| USD circulation value | $2.25B | $698.8M |
| Rank (by USD value) | #11 | #17 |
| Peg | USD | USD |
| Mechanism | fiat-backed | fiat-backed |
| Backing | Tokenized US Treasuries (BlackRock) | — |
| Chains deployed | 8 | 4 |
| Primary chain | Solana | Tempo |
| Issuer | BlackRock (tokenized by Securitize) | — |
| CoinGecko | View → | View → |
Frequently Asked Questions
What's the main difference between BUIDL and OUSD?
Both track USD, so they compete for the same use cases. BUIDL holds tokenized us treasuries (blackrock). We track no published reserve breakdown for OUSD. BUIDL ranks #11 by USD value and OUSD ranks #17.
Which is bigger, BUIDL or OUSD?
BUIDL is larger, with $2.25B in circulation vs $698.8M for OUSD. That's roughly 3.2× the size.
Is BUIDL safer than OUSD?
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 fiat-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 BUIDL and OUSD?
Yes. BUIDL and OUSD 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 BUIDL or OUSD?
The right choice depends on your use case. Consider: which chain do you need? BUIDL is available on 8 chains and OUSD 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.