Cardano (ADA) is a proof-of-stake blockchain platform that runs smart contracts and supports native tokens. Its native token, ADA, pays transaction fees, is delegated to stake pools, and carries voting weight in on-chain governance. The network runs the Ouroboros consensus protocol and uses an extended UTXO (eUTXO) ledger, which Cardano describes as the first blockchain protocol based on peer-reviewed research (Cardano Docs).
Core technology and architecture
Cardano's ledger records unspent transaction outputs rather than account balances. The extended UTXO model attaches data to each ledger entry to support smart contracts, and Cardano states that deterministic validation and contract isolation reduce the risk of errors and exploits (Cardano Foundation). Smart contracts run on Plutus, and in February 2026 stake pool operators and DReps voted to raise Plutus execution limits (Cardano.org).
Two scaling and security components sit alongside the base chain. Hydra is a layer 2 protocol in which small groups of participants share an off-chain mini-ledger called a Head (Cardano Docs). Mithril produces certified snapshots of chain state, which first speed up node bootstrapping and also support light wallets and bridges (Cardano Docs).
Primary use cases
Cardano's applications centre on payments, stablecoins, and digital identity. USDCx, a 1:1 USDC-backed asset, launched in February 2026 through Circle's xReserve infrastructure (Finextra). KuCoin reported in September 2026 that the network supports five native stablecoins: USDCx, USDM, USDA, DJED, and iUSD (KuCoin).
The EMURGO and Wirex Cardano Card was announced in November 2025, with a non-custodial version forecast for 2026 (EMURGO). Project Catalyst has funded Atala PRISM decentralized identity projects covering education, career, and reputation credentials.
Who is behind Cardano and where is it based?
Cardano was started in 2015 by Charles Hoskinson and Jeremy Wood, and its mainnet launched in September 2017 (Wikipedia). Hoskinson is a named co-founder of Ethereum, and IOG's leadership page lists him as CEO and founder (IOG Leadership). The sources reviewed do not give a detailed biography of Wood. The project is not anonymous, but no single headquarters country is established for the protocol as a whole.
Three organizations shared the work at genesis, and each has a separate legal identity:
- Input Output (IO), formerly IOHK and Input Output Global (IOG): Builds the core engineering and research. It rebranded as Input Output (IO) in December 2025 (IOG). Its jurisdiction is disputed. A Wyoming filing records "Input Output Global, Inc." as formed in Delaware in 2016 and domesticated in Wyoming in 2018, with a Longmont, Colorado principal office (Wyoming Business Division). An SEC filing describes IOG as a Cayman Islands company (SEC).
- Cardano Foundation: A Swiss foundation (Stiftung), registered as CARDANO Stiftung with registration number CHE184477354 and created in 2016 (GLEIF). Its operating base is Zug, Switzerland (Cardano Foundation).
- EMURGO: Handles commercial adoption. The legal entity is EMURGO Group Pte. Ltd., a Singapore company incorporated on 2 May 2018 (SGPBusiness).
Intersect, a Wyoming Mutual Benefit Nonprofit incorporated on 13 July 2023, coordinates the community's governance processes (Intersect).
Tokenomics
Cardano has a fixed maximum supply of 45 billion ADA. At the snapshot time, ADA traded at $0.1932 with a market cap of $7.26B (rank #22) and 24h volume of $169.47M. Circulating supply was 37,577,688,969 ADA, and the all-time high was $3.09, with the current price 93.75% below it.
Public sales accounted for 57.62% of maximum supply, sold between October 2015 and January 2017. IOHK received 5.47% (Findas). Staking rewards come from transaction fees and monetary expansion. Each epoch, 0.3% of the remaining reserve is added to a reward pot, and the treasury receives 20% of that pot (Cardano Docs). The reserve held 6.127 billion ADA at epoch 655 (CryptoSlate). Because rewards draw from a shrinking reserve, reward payouts are expected to decline over time, and Cexplorer states that Cardano will not have tail inflation (Cexplorer).
Consensus and network security
Ouroboros is a proof-of-stake protocol. Stake pools produce blocks in proportion to the stake they control, and time is divided into epochs and slots (Cardano Docs). Cardano states that the protocol's guarantees hold while honest participants control the majority of stake. There is no slashing: a misbehaving pool earns no rewards, but delegated ADA is not at risk (Cardano.org).
As of 30 September 2026, the network had 2,890 stake pools (Cardano on X). Active stake was 21.32 billion ADA in epoch 658, or 58.0% of circulating supply, down from 64.8% in 2024 (SQ Magazine).
Partnerships and ecosystem integrations
- Midnight: A privacy-focused partner chain with its own ledger and consensus. Charles Hoskinson said he invested about $200 million of his own funds to subsidize its development, and early node operators include Worldpay, MoneyGram, eToro, and Google Cloud (The Block).
- Mastercard: The Cardano Foundation joined Mastercard's Crypto Partner Program on 15 September 2026 (Gate News).
- Critical Integrations Program: IO reported that ₳70 million was approved in late 2025 for stablecoins, cross-chain messaging, oracles, and custody. Three of five priority integrations had been delivered by May 2026 (Intersect).
Competitive advantages
Cardano's differentiators are its research-first design, its deterministic eUTXO validation, and its consensus protocol, which the project describes as provably secure. Its no-slashing rule means ADA delegators do not risk their holdings through pool misbehaviour. Native token support is built into the base chain, and the Voltaire governance model is set up for ADA holders, stake pools, and DReps to vote on upgrades.
Development activity and roadmap
Van Rossem, which moved the network to protocol version 11, was ratified on-chain at the 13 July 2026 epoch boundary and enacted on 18 July 2026. It was the first hard fork ratified end-to-end through Voltaire governance (CoinDesk).
The next era, Dijkstra, has a Phase 1 code-complete target of Q4 2026. It includes Ouroboros Linear Leios, and Phase 2, Peras, is planned for Q2 2027 (Intersect). The Leios testnet launched on 23 June 2026. IO says the initial Leios rollout is expected to deliver three to five times current transaction capacity, subject to mainnet results and later governance votes (IO). The Dijkstra enactment window of 5 December 2026 to 4 January 2027 is a forecast, not a confirmed date.