1. What Is Cardano?
Cardano is an open-source, decentralized blockchain platform designed to support smart contracts, decentralized applications (dApps), digital identity, tokenization, and decentralized finance (DeFi). It uses a Proof-of-Stake (PoS) consensus mechanism called Ouroboros, which is designed to be more energy-efficient than Proof-of-Work blockchains. Cardano launched in 2017 and emphasizes peer-reviewed academic research and formal methods in its development. Its native cryptocurrency is ADA.
2. What Is ADA?
ADA is the native cryptocurrency of the Cardano blockchain. It is used to:
Pay transaction fees
Stake to help secure the network
Participate in governance voting
Transfer value globally
Interact with decentralized applications (dApps)
Mint and trade native assets
ADA is named after Ada Lovelace, a 19th-century mathematician widely regarded as one of the world’s first computer programmers.
3. What Is Cardano Used For?
Cardano supports a wide range of blockchain applications, including:
Decentralized Finance (DeFi)
Smart contracts
NFTs
Real-world asset tokenization
Supply chain tracking
Digital identity solutions
Government and enterprise blockchain applications
Decentralized autonomous organizations (DAOs)
Its long-term goal is to provide a secure and scalable blockchain infrastructure for individuals, businesses, and governments worldwide.
4. Who Founded Cardano?
Cardano was founded by Charles Hoskinson, one of Ethereum’s original co-founders.
The project officially launched in September 2017 after several years of research and development. Cardano’s ecosystem is supported by three key organizations:
Input Output (IO)
Cardano Foundation
EMURGO
Together, these organizations help develop, promote, and grow the Cardano ecosystem.
5. What Is Input Output (IO)?
Input Output (formerly IOHK, or Input Output Hong Kong) is the blockchain engineering and research company responsible for designing and developing Cardano.
Founded in 2015 by Charles Hoskinson and Jeremy Wood, IO develops Cardano’s core protocol, conducts academic research, builds new blockchain technologies, and maintains much of the network’s software infrastructure. Although the company was originally known as IOHK, it now primarily uses the name Input Output (IO).
6. What Is the Cardano Foundation?
The Cardano Foundation is an independent, non-profit organization based in Switzerland that supports the adoption and long-term growth of the Cardano blockchain.
Its primary responsibilities include:
Promoting Cardano adoption
Supporting community development
Encouraging regulatory engagement
Protecting the Cardano brand
Advancing governance initiatives
Supporting ecosystem partnerships
Unlike Input Output, the Cardano Foundation does not develop the protocol itself but focuses on ecosystem growth and stewardship.
7. What Is Cardano’s Maximum Supply?
Cardano has a fixed maximum supply of 45 billion ADA.
Unlike Ethereum, no additional ADA can be created beyond this limit. The fixed supply is designed to provide predictable monetary policy and scarcity over the long term.
8. What Is Cardano’s Total Supply?
Cardano’s total supply is approximately 45 billion ADA, representing the maximum number of ADA that can ever exist. Most of this supply has already been issued, while the remaining ADA enters circulation gradually through staking rewards funded from the network’s reserves.
9. What Is Cardano’s Circulating Supply?
Cardano’s circulating supply changes over time as additional ADA is distributed through staking rewards.
As of 2026:
Circulating Supply: approximately 36 billion ADA
Maximum Supply: 45 billion ADA
The exact circulating supply varies slightly and can be tracked on major cryptocurrency market data platforms.
10. What Is Midnight?
Midnight is a privacy-focused blockchain developed by Input Output as a partner network to Cardano. It is designed to enable developers and organizations to build decentralized applications that protect sensitive information while still complying with regulatory requirements.
Midnight uses zero-knowledge cryptography to allow selective disclosure of data, enabling users to prove certain information without revealing all underlying details. The network is intended for use cases such as financial services, healthcare, identity management, and enterprise applications where privacy is important.
11. What Is Ouroboros Leios?
Ouroboros Leios is a proposed evolution of Cardano’s Ouroboros Proof-of-Stake consensus protocol aimed at significantly increasing the network’s throughput and scalability.
Leios introduces a new transaction-processing architecture that separates transaction dissemination from block validation, allowing more transactions to be processed without sacrificing decentralization or security. Once implemented, it is expected to substantially improve Cardano’s performance while maintaining its energy-efficient Proof-of-Stake design.
12. What Is Cardano’s All-Time High?
Cardano reached its all-time high price of approximately $3.10 on September 2, 2021, ahead of the Alonzo smart contract upgrade during the 2021 cryptocurrency bull market.
13. What Is Cardano’s All-Time Low?
Cardano reached its all-time low price of approximately $0.01735 on October 1, 2017, shortly after the cryptocurrency began trading publicly.
