Cardano (ADA) is a proof-of-stake Layer-1 blockchain that uses the Ouroboros consensus protocol; ADA is the network's native coin, not a token issued on another chain. Founded by Charles Hoskinson and Jeremy Wood, Cardano launched its mainnet in 2017 and is developed principally by Input Output Global (IOG, formerly IOHK).
The network supports staking, Plutus-based smart contracts, and on-chain governance voting under CIP-1694, functioning as a general-purpose settlement and application layer.
Cardano differentiates itself through a peer-reviewed, research-first development process and a formal on-chain governance system (CIP-1694) built directly into the protocol rather than layered on afterward. Its Ouroboros consensus and staged architecture underpin scalability efforts such as the Leios upgrade, which reported roughly a 6x mainnet-throughput improvement in its first public testnet run on August 27, 2026.
Actual on-chain usage remains modest: trailing 30-day protocol fees totaled about $37,923 and revenue about $7,585, with daily active addresses averaging 13,453 - a light but measurable activity base relative to Cardano's market capitalization.
ADA functions as both a utility and a governance token. Holders stake ADA by delegating to Stake Pool Operators to help secure the network and earn rewards, and ADA pays transaction and Plutus smart-contract fees.
Under the CIP-1694 on-chain governance system, ADA holders also vote directly or delegate voting power to a Delegated Representative (DRep) on a one-lovelace-one-vote basis, giving the token a direct role in network decision-making alongside its transactional use.
With circulating supply already at roughly 83% of its fixed cap, net new ADA issuance is disinflationary as total supply converges toward the 45 billion maximum.
Cardano's ADA token was sold through a public ICO run in five stages from September 2015 to January 2017, raising $62,240,000 at an implied price of $0.0487 per ADA. The sale distributed approximately 30 billion ADA in total.
Roughly 95% of ICO buyers were based in Japan, reflecting Cardano's initial go-to-market focus there before global expansion. The Cardano mainnet (Byron era) launched in 2017, the same year the ICO concluded.
Cardano is a standalone Layer-1 blockchain that uses Ouroboros, a peer-reviewed proof-of-stake consensus protocol; ADA is its native coin rather than a token issued on another chain. Stake Pool Operators (SPOs) validate blocks and vote on certain protocol-level decisions, such as hard forks. Smart contracts execute via the Plutus platform.
Cardano was founded by Charles Hoskinson, a mathematician and Ethereum co-founder (2013), together with Jeremy Wood, also formerly of Ethereum. The two co-founded Input Output Hong Kong (IOHK, since rebranded Input Output Global, IOG) in 2015 as Cardano's core engineering and research entity, with Wood serving as Founder and Chief Strategy Officer.
Hoskinson remains Cardano's most public figure, continuing to comment on strategy, governance, and cross-chain collaboration as of August 2026.
Cardano is maintained by a multi-entity structure Charles Hoskinson has termed the Pentad, comprising Input Output Global (IOG), EMURGO, the Cardano Foundation, the Midnight Foundation, and Intersect. IOG leads core protocol engineering and research, EMURGO drives commercial and ecosystem growth, and the Cardano Foundation, a Swiss non-profit, stewards the Cardano brand and standards. The Midnight Foundation stewards the related Midnight privacy sidechain, while Intersect handles open-source and community stewardship functions.
As of 2026, public tension exists between Hoskinson and the Foundation/EMURGO over commercial execution and treasury allocation.
Cardano governs itself on-chain under CIP-1694, effective since around November 2024, marking the start of the Voltaire governance era. The transition burned the network's genesis keys, transferring control to the community.
Governance runs through three bodies: Delegated Representatives (DReps), who vote on proposals on a one-lovelace-one-vote basis; a Constitutional Committee, which rules only on constitutionality; and Stake Pool Operators, who vote on hard forks and select protocol parameters. As of late August 2026, DRep and SPO turnout for four open Constitutional Committee seats was running well below the roughly 67% quorum threshold ahead of a September 1, 2026 deadline.
Cardano's Leios upgrade reported approximately a 6x mainnet-throughput improvement in its first public testnet run on August 27, 2026, targeting network scalability.
In late August 2026, Charles Hoskinson publicly proposed deeper Cardano-Ethereum engineering collaboration on shared smart-contract and technical goals, estimating that real integration could occur within months. He also disclosed approximately $500 million in soft commitments toward a Bitcoin-DeFi-on-Cardano initiative, with potential to scale toward $1 billion.
Cardano maintains a governance-ratified Auditor Registry (CIP-52) listing trusted third-party smart-contract auditors, including CertiK; Runtime Verification develops formal correctness proofs for Cardano contracts.
In November 2025, a crafted malformed transaction exploited a deserialization bug, causing a several-hour consensus-level chain split with no user funds lost - the first major consensus disruption in Cardano's 8-year history. In June 2026, the SecondFi (formerly Yoroi) wallet suffered a key-generation exploit draining roughly 16 million ADA from 374 wallets, a wallet-layer rather than base-protocol flaw. Wallets holding at least 1 million ADA controlled about 67.5% of supply as of May 2026, a six-year high.
