What Is USDS Stablecoin? A Clear Guide to Sky's Token
USDS is the dollar-pegged stablecoin issued by Sky (formerly MakerDAO). Here is how it works, where it circulates, and why it matters.
USDS is a dollar-pegged stablecoin issued by Sky, the protocol formerly known as MakerDAO. Each token is designed to trade at $1 and is backed by a mix of crypto collateral and other reserve assets held by the protocol, making it a crypto-backed, native stablecoin rather than one issued directly against a bank account. It is the successor branding to DAI within Sky's ecosystem, aimed at users who want an onchain dollar with programmable, protocol-governed backing.
According to Allium's dataset (as of August 4, 2026), USDS has an onchain circulating supply of $6.37B spread across four blockchains. The overwhelming majority sits on Ethereum at $6.25B, followed by Arbitrum at $0.10B, Solana at $0.01B, and a nascent presence on Base. These figures come from Allium's stablecoins dataset, which standardizes raw onchain activity across 150+ blockchains into verticals that institutions can audit.
Key takeaways
- USDS is Sky's (formerly MakerDAO) dollar stablecoin, classified as crypto-backed and native, meaning it is minted against onchain collateral rather than a custodial bank deposit.
- According to Allium's stablecoins dataset, USDS onchain circulating supply is $6.37B as of August 4, 2026, with $6.25B of that on Ethereum.
- USDS is the rebranded evolution of the token layer that began as DAI, part of Sky's broader restructuring of the MakerDAO ecosystem.
- Distribution is highly concentrated: Ethereum carries roughly 98% of supply, with Arbitrum, Solana, and Base holding the remainder.
- Because backing is governed by a decentralized protocol, transparency depends on verifiable onchain data rather than a single quarterly attestation.
Why this matters now
Stablecoins have moved from a crypto-trading utility to a piece of financial infrastructure. Payment networks, fintechs, and asset managers now treat dollar tokens as settlement rails, and regulators are writing rules around how they must be backed and reported. Visa built a public stablecoin dashboard using Allium data, and the Federal Reserve has cited Allium data in its research, signals that onchain dollars are being studied with the same seriousness as traditional money-market instruments.
USDS occupies a specific niche in that shift. Where the largest fiat-backed stablecoins hold reserves in bank accounts and Treasury bills, USDS is minted through a protocol that accepts crypto and tokenized assets as collateral. That design appeals to onchain-native users and DeFi applications that want a dollar unit which lives entirely within composable smart contracts. It also raises harder questions about verification, which is where reliable onchain data becomes the reference point rather than a marketing claim.
The broader context is that stablecoins are increasingly used for cross-border value transfer. A joint FXC Intelligence and Allium report on stablecoins' share of cross-border payments shows how quickly these instruments are being adopted for real movement of money, not just speculation.
How USDS works
USDS follows the collateralized-debt-position model that Sky inherited and refined from MakerDAO. The mechanics look like this:
- A user deposits collateral. Assets such as ETH, other approved crypto tokens, and certain tokenized real-world assets are locked into Sky smart contracts.
- The protocol mints USDS against that collateral. Users can borrow USDS up to a limit set by a collateralization ratio, which keeps the system over-collateralized as a buffer against price swings.
- Peg stability is managed by protocol mechanisms. Interest rates on borrowing, savings rates on holding, and stability modules that allow near-1:1 swaps with other stablecoins all push the market price back toward $1.
- Redemption and liquidation enforce the backing. If collateral value falls below required thresholds, positions are liquidated to keep outstanding USDS fully backed.
- Governance sets the parameters. Sky token holders vote on collateral types, ratios, and rates, so the backing policy is transparent onchain but subject to change.
Because every mint, burn, and transfer happens onchain, the true circulating supply can be measured directly from the blockchain instead of taken on trust. That is the same principle behind onchain financial market infrastructure, where settlement and record-keeping live in the same public ledger.
Where USDS actually lives
Supply distribution tells you where a stablecoin is used and where its risk concentrates. According to Allium's stablecoins dataset, USDS is heavily anchored on Ethereum, home to Sky's core contracts and the deepest DeFi liquidity.
| Chain | USDS onchain supply | Approximate share |
|---|---|---|
| Ethereum | $6.25B | ~98% |
| Arbitrum | $0.10B | ~1.6% |
| Solana | $0.01B | ~0.2% |
| Base | $0.00B | <0.1% |
| Total | $6.37B | 100% |
The concentration on Ethereum means USDS behaves, for now, primarily as an Ethereum-ecosystem dollar. Its footprint on Arbitrum, Solana, and Base is early, which matters if you are evaluating where liquidity exists for large redemptions or where a payment application can reliably source USDS.
USDS versus other stablecoin models
Not all dollar tokens are built the same way. Understanding the backing model tells you what could break the peg and who is accountable when it does.
| Attribute | USDS (crypto-backed) | Fiat-backed stablecoins |
|---|---|---|
| Backing | Crypto and tokenized assets held in smart contracts, over-collateralized | Cash and short-term government debt held with custodians |
| Issuer | Sky protocol, governed by token holders | A centralized company |
| Verification | Onchain collateral plus protocol data | Periodic attestations from an accounting firm |
| Peg mechanism | Collateral ratios, rates, and stability modules | Direct redemption at par with the issuer |
| Primary risk | Collateral volatility and governance decisions | Custodian and counterparty risk |
Why this matters for real users
The practical benefits of a crypto-backed dollar like USDS show up as concrete changes in how money moves and how it is verified.
- Continuous settlement: Before, moving dollars between financial systems could take one to two business days and stop on weekends. With USDS, a transfer settles onchain in minutes at any hour, so capital is not locked up waiting for banking hours.
- Composability: Before, integrating a dollar balance into an application meant custodial APIs and permissioned access. With USDS, any smart contract can hold, lend, or route the token without asking an issuer for permission.
- Auditable supply: Before, you trusted a monthly report to know how many dollars existed. With an onchain token, the circulating supply is measurable in real time, as Allium's dataset shows with the $6.37B figure.
- Programmable yield: Before, earning on idle dollars required a separate savings product. USDS holders can access protocol-native savings rates directly through Sky contracts.
These are the same properties that make tokenized assets attractive across the board, from stablecoins to tokenized equities and onchain stocks, where settlement and ownership records live on the same ledger.
How the data gets verified
A stablecoin is only as trustworthy as the data behind it. For fiat-backed tokens, that means attestations. For a protocol-governed token like USDS, it means reading the chain directly and standardizing the raw output so it can be compared across issuers and networks.
Allium is the data foundation for onchain finance, ingesting raw data from 150+ blockchains and organizing it into verticals such as stablecoins, real-world assets, lending, and staking. That standardized, SOC-certified output is delivered through databases, APIs, and data streams. It is what let a16z use Allium data in its State of Crypto report and what Bitwise cited as a primary data source in its Q3 2026 staking report.
The same reliability requirement drives how institutions build trust. Stellar's approach to winning institutional trust with independent onchain insights and Ondo's work turning onchain activity into market intelligence both show why accountable data, not screenshots, underpins serious finance.
Risks and open questions
USDS carries a distinct risk profile that anyone holding or building on it should weigh honestly.
- Collateral volatility: Crypto backing can lose value quickly. The system relies on over-collateralization and timely liquidations to stay fully backed, and stressed markets can strain that process.
- Governance concentration: Parameters like accepted collateral and rates are set by Sky token holders. Governance can adjust the risk profile of the token in ways a passive holder does not control.
- Chain concentration: With roughly 98% of supply on Ethereum, USDS liquidity outside that ecosystem is thin, which affects cross-chain payments and large redemptions.
- Reserve transparency: Crypto-backed does not mean fully verifiable at a glance. The composition of collateral and any tokenized real-world assets require ongoing onchain and offchain scrutiny, and only figures published by reliable sources should be treated as fact.
- Regulatory ambiguity: Stablecoin rules are still forming across jurisdictions, and protocol-governed tokens sit in a less-defined category than fiat-backed issuers.
As tokenized instruments proliferate, questions of identification and consolidated reporting grow in importance, themes explored in guides on the identifier for tokenized securities and the consolidated tape for tokenized equities. The same infrastructure discipline that markets built for equities is now being demanded of stablecoins.
Frequently asked questions
What is USDS stablecoin?
USDS is a dollar-pegged stablecoin issued by Sky, the protocol formerly known as MakerDAO. It is classified as a crypto-backed, native stablecoin, meaning it is minted against crypto and tokenized collateral held in smart contracts rather than against a custodial bank deposit.
Who issues USDS?
USDS is issued by Sky, which was previously called MakerDAO. The protocol is governed by its token holders, who vote on collateral types, collateralization ratios, and rates that keep USDS pegged to the US dollar.
How much USDS is in circulation?
According to Allium's stablecoins dataset, USDS had an onchain circulating supply of $6.37B as of August 4, 2026, spread across four blockchains.
Which blockchains support USDS?
USDS circulates on Ethereum, Arbitrum, Solana, and Base. Ethereum holds the vast majority at $6.25B, roughly 98% of total supply, according to Allium's dataset.
How is USDS different from USDC or USDT?
USDS is crypto-backed and minted through the Sky protocol against onchain collateral, while USDC and USDT are fiat-backed tokens issued by centralized companies that hold cash and short-term government debt as reserves. The main difference is what backs the token and who is accountable for that backing.
Is USDS the same as DAI?
USDS is the successor branding to DAI within Sky's ecosystem following the rebrand from MakerDAO to Sky. It represents the evolution of the same collateralized dollar model, with updated tokenomics and governance.
