Tether vs Circle · USDT vs USDC
Tether (USDT issuer) and Circle (USDC issuer) are the two largest USD-pegged stablecoin issuers. They represent two completely different paths on compliance, reserve transparency, and listing status.
Tether
The largest stablecoin issuer by circulation. USDT launched 2014. Quarterly attestation; ~80% reserves in US T-Bills.
Circle
USDC issuer, listed on NYSE (CRCL, 2024). Monthly Deloitte audit. NYDFS BitLicense + multi-state MTL + EU EMI.
14-dimension comparison
| Dimension | Tether | Circle |
|---|---|---|
| Primary stablecoin | USDT | USDC |
| Issuer | Tether Operations Limited | Circle Internet Financial |
| Operating HQ | Hong Kong + British Virgin Islands | Boston + New York |
| Listed? | No | NYSE: CRCL (Jun 2024 IPO) |
| Circulation (Q1 2026) | ~$118B | ~$35B |
| Reserve disclosure | Quarterly attestation (BDO Italia) | Monthly audit (Deloitte) |
| Reserve composition | ~80% T-Bills + 12% overnight repo + 5% BTC/gold/other | ~100% T-Bills + cash + overnight repo (no BTC / gold) |
| US regulation | Does not actively pursue US licensing | NYDFS BitLicense + multi-state MTL |
| EU MiCAR status | Restricted in EU (does not meet MiCAR EMT requirements) | EU EMI license (France ACPR) + EURC fully MiCAR-compliant |
| Historical incidents | 2019 NYAG $42.5M settlement (reserve disclosure) | 2023-03 SVB crisis short de-peg to $0.87 |
| Chain coverage | 14 chains (TRC20 ~53% / ERC20 ~42%) | 17 chains + native CCTP |
| USDT card compat | All 13 tracked cards | Most cards support topup, but settlement currency is still USDT |
| OTC liquidity | Crypto industry de-facto standard | Institutional + public-company default |
| Primary risk | Reserve transparency + offshore-structure regulatory risk | US-regulator concentration + banking-channel risk (2023 SVB) |
FAQ
Which is safer, USDT or USDC?
Different dimensions give different answers. Reserve transparency: USDC wins decisively (monthly Deloitte audit vs quarterly BDO attestation). Circulation + liquidity: USDT wins ($118B vs $35B). Regulatory concentration risk: USDT is lower (offshore structure is dispersed). For USDT card users holding small amounts for daily spend, both are acceptable.
Can I top up a USDT card with USDC?
It depends on the issuer. The wallets behind MPCard / Bybit Card / OKX Card typically accept both USDT and USDC topups, but the underlying settlement currency is still USDT. Crypto.com Visa and other compliant-track cards may default to USDC. Check the topup-asset dropdown in the issuer app.
Why is USDT circulation 3x USDC?
Main reasons: 1) USDT was 4 years earlier (2014 vs 2018), giving it first-mover lock-in on crypto OTC + exchange quoting; 2) Offshore structure makes USDT smoother for global users outside US institutions; 3) The 2023 SVB-driven USDC de-peg pushed some users back to USDT.
What's the difference between USDC monthly audit and USDT quarterly attestation?
Audit (by PCAOB-registered auditors under AICPA SAS standards) verifies internal controls + process + entire-period compliance. Attestation only verifies asset balance at disclosure date matches liabilities. Audit > attestation in legal weight. MiCAR and similar regimes require audit, not attestation.
What happened in the 2023 SVB USDC de-peg?
On 2023-03-10 SVB collapsed; Circle disclosed it held $3.3B in reserves at SVB (~8% of USDC backing). Markets feared losses would trigger a de-peg. USDC briefly fell to $0.87. The Fed + FDIC bailed out all SVB deposits over the weekend; USDC was back at $1 by Monday. The event exposed the "compliant stablecoin + traditional bank channel" hidden risk.
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