This page gives you a friendly, high‑level overview of Cardano: what it is, who created it, how it works, and how it compares to Bitcoin and Ethereum.
If you are totally new, you can read straight down the page; later, you can return here whenever you need to refresh your understanding.
Cardano is a public Layer 1 blockchain that lets people send and receive digital money (ADA), run applications, and store information without a central company in charge.
The network is run by many independent computers (nodes) around the world that all follow the same open rules instead of a single company’s server.
Cardano was started by Charles Hoskinson and Jeremy Wood, who previously worked on Ethereum before founding the company IOHK in 2015 to build Cardano.
Today, three main organizations support the ecosystem: IOHK (engineering and research), the Cardano Foundation (governance and standards), and EMURGO (commercial adoption).
Cardano uses a proof‑of‑stake consensus protocol called Ouroboros, where stake pools create new blocks instead of energy‑hungry miners.
Time is split into “epochs” and short “slots”; for each slot, a stake pool is chosen to add a block, and ADA holders can delegate their ADA to pools and share rewards.
ADA is the native cryptocurrency of Cardano and is used to pay transaction fees, send value between people, and participate in the network through staking and governance.
The name “ADA” comes from Ada Lovelace, an early computer science pioneer, and the project name “Cardano” comes from the Italian mathematician Gerolamo Cardano.
Supporters like that Cardano focuses on formal research, energy efficiency, and features for identity, finance, and other real‑world use cases.
Critics point out that progress can be slow and that many features have rolled out over several years, so it is important to keep realistic expectations.
This page is for learning only. It will never ask for your seed phrase, private keys, or for you to send ADA anywhere. Those details must stay secret.
If any website, app, or person asks for your seed phrase or private keys, treat it as a scam, close the page, and do not continue.This quick overview shows where Cardano is similar to, and different from, the other two well‑known blockchains, Bitcoin and Ethereum.
| Feature | Bitcoin | Ethereum | Cardano |
|---|---|---|---|
| Main purpose | Digital money / store of value | Smart contracts and apps | Smart contracts, identity, finance |
| Native coin | BTC | ETH | ADA |
| Consensus today | Proof‑of‑work (miners) | Proof‑of‑stake (validators) | Proof‑of‑stake (Ouroboros, stake pools) |
| Energy use | High (mining requires a lot of power) | Lower than Bitcoin after PoS switch | Low, designed to be energy‑efficient |
| Smart contracts | Very limited | Large app ecosystem | Growing app ecosystem, smaller than Ethereum |
| Fees | Can be high when demand is strong | Can get very high during busy periods | Typically lower and more stable |
| Design approach | First major cryptocurrency, simple and conservative | Move fast, huge developer community | Research‑driven, slower but more formal upgrades |
When you feel comfortable with these basics, the next step is to set up a wallet safely so you can hold and use ADA. You can continue with the wallets guide or go back to the Intro page.