USDT and USDC dominate the dollar-stablecoin market, but the two companies behind them could not be more different. Tether Holdings is a privately owned issuer that operates from El Salvador and the British Virgin Islands, prints reserves attestations through BDO Italia, and treats emerging-markets dollar access as its core mission. Circle Internet Financial is a Boston-headquartered firm that has filed twice with the SEC to go public, holds licenses across the US, EU, and Singapore, and frames USDC as regulated programmable money. This article compares the companies, not the tokens. For a side-by-side of USDT and USDC as products, see our USDC vs USDT guide.
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Tether is older, larger by supply, and operates with looser disclosure. Circle is smaller by float but holds more regulatory licenses and publishes more granular reserve data. The table below summarizes how the two issuers differ on the dimensions that matter for counterparty risk.

Tether Holdings Limited is privately owned and shares ultimate beneficial ownership with Bitfinex, the crypto exchange. iFinex Inc., the BVI-registered parent, owns both entities. Giancarlo Devasini, formerly Bitfinex CFO, is the majority shareholder and Tether's chairman. Paolo Ardoino took over as Tether CEO in December 2023 after serving as CTO since 2017.
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The company moved its headquarters from the British Virgin Islands to El Salvador in January 2025 after receiving a Digital Asset Service Provider license from the Salvadoran government. Tether reports a workforce of roughly 100 people, which is unusually small for an issuer managing more than $150 billion in reserves. The lean structure is intentional. Ardoino has said publicly that Tether prefers automation and a small core team over scaling headcount.
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Circle was founded in 2013 by Jeremy Allaire and Sean Neville. Allaire remains CEO. The company is headquartered in Boston and is privately held, with backers including Goldman Sachs, BlackRock, Fidelity, General Catalyst, and Accel. Circle attempted to go public in 2022 via a SPAC merger with Concord Acquisition Corp, which the parties terminated in December 2022 citing regulatory delays. Circle then filed a confidential S-1 registration statement with the SEC in January 2024. As of mid-2026, the IPO has not priced, and Circle remains private.
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Circle employs roughly 900 people across offices in Boston, New York, Dublin, London, Paris, and Singapore. The org chart looks like a regulated financial institution: it includes a chief compliance officer, a general counsel who is a former federal prosecutor, and a chief risk officer.
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Both issuers publish attestations, but the format and frequency differ. Tether publishes quarterly attestations from BDO Italia and a daily "transparency page" on tether.to showing aggregate reserve composition. The reserves include US Treasuries (the majority), bitcoin, gold, secured loans, and "other investments." Tether has never published a full financial audit. It has said an audit is in progress with a Big Four firm, but no completed audit has been released as of this writing.
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Circle publishes monthly attestations from Deloitte covering the assets backing USDC. The bulk of USDC reserves sit in the Circle Reserve Fund, a SEC-registered government money market fund managed by BlackRock, with daily holdings published on the BlackRock fund page. The remainder sits as cash at regulated US banks. Circle discloses bank names in its transparency reports.
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The practical difference: a USDC holder can see what specific Treasury CUSIPs back the fund on any given day. A USDT holder sees aggregate category totals, refreshed quarterly with auditor sign-off.
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Circle has pursued a strategy of acquiring formal licenses in every major jurisdiction. The relevant filings:

Tether holds far fewer formal licenses. It registers as a money services business in some jurisdictions, and it secured a Digital Asset Service Provider license in El Salvador in 2024 alongside its HQ relocation. Tether does not hold a New York BitLicense and USDT is not authorized for issuance to New York residents. Under MiCA, Tether opted not to seek EU EMI authorization, and several European exchanges delisted USDT for EEA users in late 2024 as a result. Tether's position is that it serves users outside heavily regulated G7 markets and that licensing in those jurisdictions is not commercially necessary.
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Tether's defining regulatory event is the October 2021 settlement with the Commodity Futures Trading Commission. The CFTC found that from June 2016 to February 2019, Tether's claims that USDT was fully backed by US dollars were "untrue" for significant periods. Tether held the reserves in unsecured receivables and in commingled accounts. Tether and Bitfinex paid a combined $42.5 million in penalties without admitting or denying findings. Tether also settled separately with the New York Attorney General in February 2021 for $18.5 million over related disclosures.
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Circle's defining incident is the March 2023 Silicon Valley Bank failure. Circle disclosed on March 11, 2023 that $3.3 billion of USDC cash reserves (roughly 8 percent of the total) were held at SVB and trapped by the FDIC receivership. USDC traded as low as $0.87 over the weekend. The FDIC's Sunday announcement that all SVB depositors would be made whole restored confidence, and USDC repegged by Monday. Circle subsequently moved cash to BNY Mellon and concentrated reserves in the BlackRock-managed money market fund to reduce single-bank exposure.
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The two companies serve different theses about what a dollar stablecoin should be.
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Tether positions USDT as a dollar rail for people who cannot easily access US dollar banking. Adoption is heaviest in Turkey, Argentina, Nigeria, Vietnam, and across remittance corridors. Ardoino has repeatedly framed Tether's mission as serving the unbanked rather than satisfying G7 regulators. Tether's product decisions, including support for Tron (where most retail USDT volume sits) and resistance to EU MiCA compliance, follow from that thesis.
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Circle positions USDC as regulated programmable money. The bet is that institutions, payment companies, and developers want a stablecoin that integrates cleanly with existing financial regulation. Circle's product surface reflects this: native USDC on 20-plus chains, the Cross-Chain Transfer Protocol (CCTP) for canonical onchain movement, programmable wallets, and the Circle Mint API for institutions. For a deeper dive on canonical transfer, see CCTP cross-chain transfers.
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The honest answer is that the choice depends on what risk you are optimizing against. If you care most about reserve transparency and regulated bank custody, Circle's stack is more legible. If you care most about global access, liquidity depth, and resilience to G7 deplatforming, Tether's footprint is larger. For long-term self-custody savings, the safety questions we cover in Is Tether safe and Is USDC safe matter more than the corporate comparison above.
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One thing both companies share: they earn most of their revenue from interest on Treasury holdings. Tether reported $13 billion in 2024 net profit, primarily from Treasury yield. Circle has not disclosed full financials but referenced billions in revenue in its S-1 filings. As long as US Treasury yields remain elevated, both issuers will remain extraordinarily profitable.
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Corporate facts: tether.to/en/transparency and circle.com/transparency. Regulatory licenses: NYDFS Virtual Currency Business filings; MAS Financial Institutions Directory; ACPR REGAFI registry (France); CFTC press release 8450 (Oct 15, 2021) covering the Tether settlement; New York AG settlement filing (Feb 23, 2021). SVB exposure: Circle blog post "An Update on USDC and Silicon Valley Bank" (Mar 11, 2023) and FDIC press release on SVB receivership (Mar 12, 2023). Profit figures from Tether's Q4 2024 attestation and BDO Italia consolidated reserves report. Employee counts from public statements by Ardoino and Allaire and from Circle's LinkedIn-disclosed headcount range.
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