Stablecoin market structure: issuers, supply, concentration

The stablecoin market is large, fast-growing, and lopsided. Total supply stands at roughly $304 billion as of mid-July 2026, and about 85% of it belongs to two issuers: Tether’s USDT at around $184 billion and Circle’s USDC at around $73 billion. Everything below that line, from bank consortium tokens to PayPal’s PYUSD, competes for the remaining sixth of the market. This page is the reference table, dated so it can be refreshed, and the structural reading of what the table means for institutions.

All figures below are as of 16 July 2026, from CoinGecko’s stablecoin category data, cross-checked against DefiLlama; supply figures move daily and this page is refreshed quarterly.

The issuer table, July 2026

Token	Issuer	Supply (approx.)	Share	Notes
USDT	Tether	$184B	~61%	Not MiCA-authorized; dominant in emerging-market corridors
USDC	Circle	$73B	~24%	MiCA-authorized EMT; dominant in regulated institutional flows
USDS	Sky	$10B	~3%	Successor to the DAI ecosystem’s savings token
DAI	Sky (legacy)	$4.6B	~1.5%	Collateralized, partly by other stablecoins
USD1	World Liberty Financial	$4.3B	~1.4%	Politically prominent US issuer
USDe	Ethena	$4.0B	~1.3%	Synthetic dollar, hedged-position backing rather than fiat reserves
USDG	Paxos (Global Dollar Network)	$3.2B	~1%	Consortium distribution model; S&P peg assessment “strong”
PYUSD	PayPal (issued by Paxos)	$2.8B	~0.9%	Consumer-brand distribution
RLUSD	Ripple	$1.5B	~0.5%	NY trust charter; integrated into Ripple Payments

Two structural notes on the table. Not everything in it is the same instrument: USDe is a synthetic dollar backed by hedged trading positions rather than a fiat-reserve stablecoin, and DAI is collateralized partly by other stablecoins; institutions comparing “stablecoins” should check the backing model before comparing the yield. And the euro segment barely registers at this scale; the largest euro token, EURC, is around $0.4 billion, covered in euro stablecoins.

How the market got this shape

Supply followed liquidity, and liquidity followed first-mover corridors. USDT built its base in exchange trading pairs and emerging-market dollar demand, where its reach still dominates; USDC built its base in US-regulated and institutional flows, and its MiCA authorization extended that position into the EEA while USDT sits outside it. The regulatory split is now a market-structure force in its own right: the same coin can be the deep-liquidity choice in one region and unusable in another.

The tier below the big two is where the market is actually contested. Consortium models (USDG’s Global Dollar Network), brand distribution (PYUSD), payments-network integration (RLUSD), and bank-issued tokens are competing theories of how to bootstrap a network against incumbency. The tier’s composition changes quarter to quarter; its combined share has yet to threaten the duopoly.

The economics under the table

Stablecoin issuance is a float business. Reserves sit in short-dated instruments, the yield accrues to the issuer, and under both the GENIUS Act and MiCA the holder cannot be paid interest on the token itself. That single design choice explains much of the market’s behavior: issuers compete on distribution and network reach rather than on price, distribution partners negotiate for a share of the float economics, and rising or falling dollar rates move the whole sector’s revenue. It also explains why banks weighing issuance often prefer tokenized deposits, which keep the balance-sheet economics inside the existing charter.

What concentration means for an institution

A market where two private issuers hold ~85% of supply concentrates three exposures. Reserve exposure: the quality and custody of two reserve portfolios matter systemically, which is why attestation regimes and S&P’s peg-stability assessments exist. Operational exposure: issuance, redemption, and freezing behavior at two firms shape the whole market’s plumbing. And regulatory exposure: a rule change touching one issuer, like MiCA’s effect on USDT in the EEA, redraws corridor maps overnight. The risk taxonomy institutions should underwrite covers each in detail.

None of this is an argument against using stablecoins; institutional volume keeps growing, with Visa alone reporting a $7 billion annualized stablecoin settlement run rate in April 2026. It is an argument against building on exactly one coin. Concentration is a fact of the market; inheriting it wholesale is a choice.

Where Frame fits

Frame is the settlement layer for global finance: one integration to orchestrate payments at scale across fiat rails, stablecoins, and tokenized deposits, with compliance enforced on every transaction and settlement in seconds instead of days.

Frame is rail-neutral, and coin-neutral within the stablecoin rail. Against a market this concentrated, that neutrality is the practical hedge: policy decides which instruments qualify for which corridors, routing picks the best-fit rail per payment, and no single issuer’s reserve, regulatory, or network position becomes the institution’s own single point of failure. Frame’s Rules Engine enforces those policies inside settlement, on every transaction.

See how a rail-neutral settlement layer works: the Frame Blueprint.