What is Cardano (ADA) and what is it used for?

Cardano is a public blockchain that runs smart contracts and has its own cryptocurrency, ADA. In plain terms, what is Cardano used for? ADA pays transaction fees, secures the network through staking and lets holders vote on how the system changes. The project was founded in 2015 by Charles Hoskinson, an Ethereum co-founder, and Jeremy Wood, and its main network launched in September 2017.

What is Cardano crypto and who runs it?

Three separate organizations support Cardano. The Cardano Foundation is a non-profit that oversees the ecosystem. Input Output, often called IOG, handles research and engineering, including protocol upgrades. Emurgo is a commercial arm that invests in and helps build businesses on the network.

The project is known for a research-first approach. According to The Block, its teams have produced more than 100 academic papers on topics such as distributed systems and game theory. ADA has a fixed maximum supply of 45 billion coins.

How does Ouroboros work?

Ouroboros is Cardano's consensus mechanism, the set of rules that decides who adds the next block. It uses proof of stake rather than mining. Time is split into epochs, and each epoch is split into short slots. For each slot, the protocol picks a "slot leader" to produce a block. The more ADA staked behind a participant, the better its chance of being chosen.

Smart contracts arrived in 2022 with an upgrade called Alonzo. Developers write them with Plutus, a framework based on the Haskell programming language. Cardano also uses an "extended UTXO" model, which builds on the way Bitcoin tracks coins by attaching extra data and spending conditions to each output.

How does Cardano staking work?

What most people call Cardano staking is technically delegation. A holder assigns the weight of their ADA to a stake pool, which is a server that validates transactions and produces blocks. In return, the holder and the pool operator earn ADA rewards.

Unlike many networks, Cardano does not lock the coins. The official glossary says the ADA never leaves the holder's wallet, can be moved at any time and is not subject to slashing, a penalty some networks impose on misbehaving validators. This works because Cardano addresses keep spending rights and staking information separate. For background, see our guide to crypto staking.

What else is Cardano ADA used for?

ADA also carries voting power. On September 1, 2024, the Chang hard fork switched on on-chain governance. Holders can now delegate their votes to elected representatives called DReps, alongside stake pool operators and a Constitutional Committee. A later upgrade, van Rossem, took effect in July 2026 after being ratified entirely through that process, according to Cardano.org.

The network is also being pitched for regulated assets. On October 7, 2026, CoinDesk reported that a token standard called CIP-0113 had gone live. It lets issuers of stablecoins, funds and tokenized bonds limit who can hold their tokens and freeze or seize holdings when a court or regulator requires it. The rules sit in shared smart contracts, so no hard fork was needed.

Crypto prices are volatile and a token like ADA can lose most of its value.