What is Cardano? A guide to the ADA blockchain

You’ve probably heard of Bitcoin and Ethereum — but what about Cardano?

Often described as one of the most researched and methodical crypto projects out there, Cardano is built with a long-term vision: to make blockchain technology more secure, sustainable, and scalable. At its heart is ADA, its native token, named after Ada Lovelace, a 19th-century mathematician and computing pioneer.

If you’re curious about what is Cardano, what is ADA, or simply want to learn how ADA fits into the world of crypto, this guide will explain everything you need to know.

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Cardano at a glance

What is Cardano?

Cardano is a blockchain that aims to solve the limitations faced by earlier networks like Bitcoin and Ethereum. It was designed to be more energy-efficient, scalable, and secure — with a strong focus on academic research and peer-reviewed development.

The network supports smart contracts (digital agreement that runs automatically), decentralised apps (dApps), and token transactions. It’s structured to grow with demand, making it a popular choice for everything from decentralised finance (DeFi) to digital identity and supply chain tracking.

Cardano's native token is called ADA. It's used for a few things:

• Paying fees: you use ADA to pay for transactions
• Staking: you can 'lock up' your ADA to help the network run and, in return, earn rewards. It's like putting money in a savings account to help the bank operate
• Governance: you can use your ADA to vote on the future of the network

You can hold ADA in a Cardano wallet, use it to earn rewards through staking, or interact with apps on the blockchain.

Want to understand how wallets actually work? Learn more about crypto wallets.

Who created Cardano?

Cardano was founded by Charles Hoskinson, one of the original co-founders of Ethereum. He launched Cardano in 2017 with the goal of building a more secure and scalable blockchain.

The project is managed by three main entities:

• IOHK (Input Output Hong Kong): handles research and development
• Cardano Foundation: supports adoption and governance
• EMURGO: drives commercial partnerships and integrations

Hoskinson’s vision was to create a blockchain backed by academic theory, formal methods, and global accessibility — and that’s what continues to shape Cardano today.

How does Cardano (ADA) work?

Cardano is designed to be secure, scalable, and energy-efficient — and it achieves this using a combination of clever technologies and a structured development process. Here’s how it all fits together:

Ouroboros proof of stake (PoS)

Cardano doesn’t use mining like Bitcoin. Instead, it uses a unique PoS system called Ouroboros. This system is much more energy-efficient and helps make Cardano more sustainable.

With Proof of Stake, you can "stake" your ADA tokens. This means you temporarily lock them up to help validate transactions and keep the network secure. In return, you can earn ADA rewards.

Ouroboros divides time into "epochs" and "slots", which helps organise when and how transactions are handled. This structured approach makes the network more efficient compared to systems that need a lot of computing power.

Two-layer architecture

Unlike many blockchains, Cardano is split into two separate layers:

• Settlement layer: handles basic ADA transactions, like sending and receiving payments.
• Computation layer: powers smart contracts and apps, giving developers more flexibility.

This separation improves both scalability and security, because each layer can evolve independently without disrupting the other.

Staking and governance

Anyone who holds ADA can participate in staking by delegating their tokens to a stake pool. These pools validate transactions and keep the network running smoothly. ADA holders also get a vote in how Cardano evolves — they can vote on governance proposals, upgrades, and funding decisions for future development.

Secure and research-driven

Every upgrade to Cardano is based on peer-reviewed research and formal methods. The goal is to minimise bugs and reduce the risk of hacks — making Cardano one of the most scientifically grounded blockchains out there.

Altogether, these systems work together to make Cardano fast, low-cost, eco-friendly, and ready for real-world use cases — from finance and identity to gaming and education.

These systems make Cardano a highly efficient, sustainable, and future-ready blockchain network.

What makes Cardano different?

Cardano isn’t just another blockchain — it takes a fundamentally different approach to how blockchains are built and how they evolve.

Built on science and research

Cardano takes a scientific approach to its development. Every new feature is based on academic research and is carefully reviewed and tested by experts before it's added. This slow and steady method ensures that all changes are secure and well-thought-out, making the platform more reliable over time.

Sustainability through Proof of Stake

Rather than relying on energy-intensive mining, Cardano uses the Ouroboros Proof of Stake protocol. This makes it much more energy-efficient, with a significantly lower carbon footprint compared to blockchains like Bitcoin. It’s a better fit for the environment — and for long-term sustainability.

Designed for global impact

Cardano’s mission is to create positive real-world change. The team behind Cardano is working on partnerships in sectors like education, agriculture, healthcare, and digital identity, especially in regions that lack reliable infrastructure. This makes it a blockchain with a strong focus on financial inclusion.

Smart contracts with extra safety

Cardano's smart contracts are designed with extra safety in mind. While most blockchains allow developers to write smart contracts, Cardano uses a special language called Plutus. Plutus is designed to make smart contracts more secure and predictable, which helps reduce the risk of bugs or security issues.

No downtime — ever

Since its launch in 2017, the Cardano blockchain has never experienced a network outage or restart. That kind of uptime and reliability is rare in the crypto world, and it's part of what makes Cardano appealing to developers and institutions.

Cardano is different because it’s playing the long game — building a blockchain that’s scientifically grounded, energy-efficient, globally useful, and stable enough to support serious use cases now and in the future.

What is the ADA price and forecast for the future?

ADA, the native token of the Cardano blockchain, has seen both dramatic highs and sharp corrections — like most cryptocurrencies.

Caution and outlook

While ADA has strong foundations and long-term potential, it’s still a volatile asset. No one can predict exactly where the price will go. It’s best to approach it with realistic expectations, diversify your investments, and only invest what you’re willing to risk.

You can track ADA’s live price here or set alerts using the Revolut app.

What is Cardano’s Hydra?

Hydra is Cardano’s major scaling solution. It’s designed to help the network handle more transactions per second as more people use it — without sacrificing speed or security.

• Hydra heads: each user or application gets its own "head" — or mini-environment — that can process transactions in parallel.
• Goal: to increase throughput to over 1 million transactions per second (TPS) while keeping fees low.

Hydra is still being developed, but it’s a key part of Cardano’s long-term roadmap.

Cardano vs. Bitcoin and Ethereum

Cardano, Ethereum, and Bitcoin are often mentioned together in conversations about blockchain, but they were designed with very different goals in mind.

• Bitcoin was the first cryptocurrency, created as a decentralised digital currency to enable peer-to-peer transactions without a central authority. Its primary use case is as a store of value — often referred to as "digital gold".
• Ethereum introduced the concept of smart contracts, allowing developers to build decentralised applications (dApps). It has a large ecosystem but is sometimes criticised for high gas fees and network congestion.
• Cardano aims to improve on both by combining Ethereum's functionality with greater energy efficiency and a more structured, research-driven development model. It focuses on long-term sustainability, scalability, and real-world use cases — especially in education, healthcare, and identity services.

Cardano roadmap and development eras

One of the things that makes Cardano stand out from other blockchains is its carefully structured development roadmap. Rather than releasing new features all at once, Cardano is being built in clearly defined phases, known as "eras". Each era focuses on a specific area of functionality — from basic transactions to smart contracts, scalability, and governance.

This approach ensures that each upgrade is well-researched, thoroughly tested, and strategically introduced. It also reflects Cardano’s commitment to long-term planning and scientific rigor, setting it apart from many faster-moving but less predictable blockchain projects.

Here’s a breakdown of the five core eras:

Is Cardano worth buying?

ADA is one of the most widely held and discussed cryptocurrencies in the market. But is it right for you?

Why people invest in ADA:

• Backed by a strong academic and technical foundation
• Environmentally friendly due to Proof of Stake
• Clear long-term roadmap with steady progress
• Practical use cases in identity, education, DeFi and more

Considerations before investing:

• Slower release cycle compared to other platforms
• Smaller ecosystem than Ethereum or Solana — but growing
• Like all crypto, ADA is volatile and prices can fluctuate sharply

If you're seeking a blockchain project with long-term vision and measured progress — and you're comfortable with crypto risk — Cardano may be worth exploring.

Final thoughts on investing in Cardano

Cardano may not be the most high-profile crypto, but it's one of the most carefully designed. With its academic roots, focus on sustainability, and real-world use cases, it offers long-term potential for users and developers alike.

Still, like any crypto, ADA can be volatile. If you're thinking of investing, make sure to do your own research and consider your risk tolerance.

Want to get started? Buy cryptocurrencies securely with Revolut.

The information provided is accurate as of 23 July 2025.

Not all cryptoassets carry the same risks. Before investing, read our cryptoasset specific risk summaries to make sure you understand the different risks associated with different types of cryptoassets.

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