USDT vs USDC: Comparing the Two Largest Stablecoins

USDT and USDC are stablecoins pegged one-to-one to the U.S. dollar, each backed by reserves covering every token in circulation. Tether's USDT is the largest stablecoin, with the deepest liquidity across global exchanges. Circle's USDC is the second-largest, with Circle staking its reputation on being a publicly traded company, with frequent audits, U.S. and E.U. licenses, and institutional partnerships.

In this article, we’ll cover the history, use cases, and growth of these two leading stablecoins.

USDT vs USDC: A Side by Side

Both USDT and USDC are centralized stablecoins, meaning they are issued and managed by a central company. The firms behind USDT and USDC are Tether and Circle, respectively. Both coins are backed by asset reserves and are redeemable for one dollar per token. For most purposes, both are identical substitutes that can be swapped for the other at negligible cost.

However, the two assets diverge when it comes to their reserve policies and regulatory standing.

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USDT

USDT is the biggest stablecoin in the world, and has held that spot for years. It first appeared in 2014 on a layer built on top of bitcoin. Today it runs on more than 15 blockchains, with most of the supply and volume coming from the Tron and Ethereum blockchains.

The company behind USDT is Tether, a privately held company that was originally incorporated in the British Virgin Islands but moved its main operating entity to El Salvador in January 2025. Paolo Ardoino runs the company as chief executive.

Tether's Q1 2026 report had its total reserves valued at ~$191.8 billion. Roughly $141 billion of that sits in short-term U.S. Treasuries, ranking Tether among the largest holders of U.S. government debt in the world. The remainder of the reserves are spread across physical gold, bitcoin, secured loans, and a bucket of other investments. 

Profits for the company have been outsized lately, with around $1 billion in net income for the first quarter of 2026 alone. These are primarily generated through interest on its reserve assets.

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USDC

USDC is the second-largest stablecoin in the world. It was launched in 2018 through Centre, a joint venture between Circle and Coinbase. After that collaboration wound down in 2023, Circle is now the sole issuer.

Circle is based in New York, with Jeremy Allaire as chief executive. It is a publicly traded company on the New York Stock Exchange after having IPO’d in June 2025 under the ticker CRCL. Being a listed company, Circle files audited financial statements, and anyone can buy the stock to get exposure to its business.

USDC's reserves are held in the “Circle Reserve Fund”: a government money market fund managed by BlackRock, alongside cash reserves held in various banks. Circle’s reserves are mostly assets such as short-dated U.S. Treasuries, overnight repurchase agreements, and cash. These are reviewed by Deloitte on a monthly basis. 

Similar to Tether, Circle's revenue comes almost entirely from the interest its reserves generate. However, they hand a large portion of that income to distribution partners, with Coinbase among the largest beneficiaries. In the first quarter of 2026, those distribution costs came close to 60% of Circle's total revenue.

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USDT vs USDC: Which is More Transparent?

In terms of transparency, Circle’s USDC is the more transparent of the two, and that gap has been Circle's main selling point for years. Circle publishes monthly attestations from Deloitte and files audited financials with the SEC.

On the other hand, Tether publishes quarterly attestations. An attestation means an accountant has confirmed that on one particular date, the reported reserves matched the amount of tokens outstanding. However, it does not check whether reserves were borrowed or shuffled around in other periods of time. 

A full audit, on the other hand, covers a whole reporting window, which Tether has never done before. However, it does ostensibly plan on doing so: in early 2026, the company engaged a Big Four firm, reported to be KPMG, for its first full independent audit. Completion of the audit is still unclear as of July 2026.

The skepticism behind USDT’s reserves is not baseless. In 2021, the U.S. Commodity Futures Trading Commission (CFTC) fined Tether $41 million for claiming that USDT was fully backed by dollars between 2016 and 2019, when at times it was not. The New York Attorney General settled a separate case for $18.5 million the same year.

USDT vs USDC: Which is More Regulatory Compliant?

Regulation is the aspect in which the two differ most. Circle became the first global stablecoin issuer to comply with the European Union's MiCA regulatory framework in 2024. In July 2026, the company was also granted approval to run a national trust bank in the United States, operating as Circle National Trust, which puts USDC custody under federal supervision.

USDT’s regulatory footing in the U.S. is far less solid. From July 2025 onwards, the GENIUS Act restricted payment stablecoins to U.S.-domiciled issuers. Tether, being headquartered in El Salvador, failed to qualify.  In response, Tether launched a separate stablecoin called USAT in January 2026, issued by Anchorage Digital Bank with Cantor Fitzgerald as custodian. This separate stablecoin is aimed solely at the American market.

USDT failed to qualify under Europe’s MiCA as well, which led to exchanges, including Binance, Kraken, and Coinbase removing or restricting the stablecoin for E.U. users.

USDT vs USDC: Which is Safer?

In terms of safety, neither token has ever failed to return to a dollar after momentary de-pegs, which have happened several times in the past. 

USDC's worst de-peg was in March 2023, when Silicon Valley Bank collapsed with $3.3 billion of Circle's cash reserves (about 8% of Circle’s total reserves at the time). In reaction to this, USDC fell to roughly 87 cents over the weekend of the news before a federal backstop guaranteed SVB's deposits and Circle reopened redemptions, at which point the peg snapped back.

USDT's worst de-pegging event occurred in May 2022, when the collapse of TerraUSD led to mass panic in the market, causing USDT to briefly trade near 95 cents before recovering within hours.

How to Choose Between USDT and USDC

There is no right or wrong answer in terms of choosing between the two stablecoins. For most everyday people, the difference is negligible: the decision often comes down to whichever stablecoin is the most easily accessible. However, for anything that involves U.S. or European regulated finance, institutional treasury work, or retail users who prioritize a clear regulatory standing, USDC is the better choice. 

It is worth noting that many firms who utilize stablecoins don't even choose at all. Exchanges and trading desks routinely hold both and swap between them depending on the corridor, the counterparty, and the compliance box that needs ticking.

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Frequently Asked Questions

1. Is USDC safer than USDT?

Though both stablecoins are relatively low risk. However, USDC is often considered the lower-risk option because Circle is a publicly traded company and its reserves are reviewed monthly by Deloitte.

2. Which is bigger, USDT or USDC?

USDT. As of July 2026, it had around $184 billion in circulation, close to 60% of the stablecoin market, against about $73 billion for USDC, or roughly a quarter of the market.

3. Can USDT or USDC lose its dollar peg?

Both have momentarily lost their pegs in the past. USDC did so during the March 2023 banking crisis, and USDT during the May 2022 TerraUSD collapse. In both cases, both stablecoins restored their dollar peg within days.

4. Are USDT and USDC regulated under the GENIUS Act?

USDC is fully regulated under the GENIUS Act. USDT does not qualify under the GENIUS Act because Tether isn't a US-domiciled issuer.

5. Do USDT or USDC pay interest?

No. Holders of USDT and USDC do not earn interest for simply holding the stablecoins. Some exchanges and DeFi platforms offer yield on stablecoin deposits, but that yield comes from the platform's own lending or rewards, not from Tether or Circle.

6. Can I swap between USDT and USDC?

Yes. Major exchanges have both USDT and USDC listed. Since the two are essentially one dollar, converting between them typically costs very little.

7. What backs USDT and USDC?

Both USDT and USDC are backed by short-term U.S. Treasuries, overnight repo, and cash. However, USDT’s reserves also include assets such as gold, bitcoin, secured loans, and other investments.