PYUSDvsUSDD
PayPal USD vs USDD — side-by-side comparison of supply, chains, backing, and peg data.
Side-by-side
PYUSD — PayPal USD
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 PYUSD supply moved -2.4% and USDD +7.9% — USDD grew faster. PYUSD held the tighter band: worst deviation 5 bps against 29 bps.
Key differences
- PYUSD is roughly 1.8× larger than USDD by USD circulation value ($2.78B vs $1.51B).
- PYUSD ranks #9 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.
- PYUSD is a fiat-backed stablecoin; USDD is crypto-backed. Different mechanism, different failure modes.
- Reserves differ — PYUSD holds cash & t-bills (paypal), USDD holds algo + trx collateral.
- PYUSD is deployed on 19 chains — much broader coverage than USDD's 4.
- Primary chain differs — most PYUSD supply lives on Ethereum, while most USDD supply is on Tron.
Full comparison table
| Metric | PYUSD | USDD |
|---|---|---|
| USD circulation value | $2.78B | $1.51B |
| Rank (by USD value) | #9 | #13 |
| Peg | USD | USD |
| Mechanism | fiat-backed | crypto-backed |
| Backing | Cash & T-bills (PayPal) | Algo + TRX collateral |
| Chains deployed | 19 | 4 |
| Primary chain | Ethereum | Tron |
| Issuer | Paxos Trust Company (for PayPal) | TRON DAO Reserve |
| CoinGecko | View → | View → |
Frequently Asked Questions
What's the main difference between PYUSD and USDD?
Both track USD, so they compete for the same use cases. PYUSD holds cash & t-bills (paypal); USDD holds algo + trx collateral. PYUSD ranks #9 by USD value and USDD ranks #13.
Which is bigger, PYUSD or USDD?
PYUSD is larger, with $2.78B in circulation vs $1.51B for USDD. That's roughly 1.8× the size.
Is PYUSD 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. PYUSD uses a fiat-backed model; USDD uses a crypto-backed one. Read each issuer's most recent reserve attestation before choosing.
Can I convert between PYUSD and USDD?
Yes. PYUSD 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 PYUSD or USDD?
The right choice depends on your use case. Consider: which chain do you need? PYUSD is available on 19 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.