What is Ethereum? Ethereum is an open, public blockchain for programmable applications, with ETH serving as its native asset for transaction fees, staking, collateral, and settlement. Unlike a payment-only network, Ethereum lets developers deploy smart contracts, which are programs that execute according to predefined rules without a central operator.
Core technology and architecture
Ethereum has an execution layer and a consensus layer. The execution layer processes transactions, runs smart contracts, calculates gas fees, and maintains account and application state. The consensus layer coordinates validators, block proposals, attestations, rewards, penalties, and finality.
The Ethereum Virtual Machine, or EVM, is the network’s deterministic computing environment. Every valid node independently processes the same state transitions, allowing developers to build decentralized exchanges, lending protocols, token systems, games, identity tools, and automated organizations. Solidity and Vyper are commonly used to write contracts that compile into EVM-compatible bytecode.
Transactions consume gas, an accounting unit that prices computation and limits abuse of network resources. Standards such as ERC-20, ERC-721, and ERC-1155 allow wallets and applications to interact with fungible tokens, non-fungible tokens, and other digital assets.
Ethereum uses a rollup-centered scaling model. Layer 2 networks execute transactions away from Mainnet and publish data or proofs back to Ethereum for settlement and security. Optimistic rollups use fraud-proof processes, while zero-knowledge rollups submit cryptographic validity proofs. Dencun introduced blob data for cheaper rollup data, and later upgrades increased blob capacity and improved data-availability sampling.
What is Ethereum used for?
Ethereum supports decentralized finance, including lending, borrowing, decentralized exchanges, derivatives, liquidity provision, and staking services. Its composable contracts allow one application to interact with another, creating interconnected financial systems.
The network also hosts stablecoins used for payments, trading, remittances, collateral, and settlement. Other applications include NFTs for art, gaming assets, memberships, tickets, and collectibles; tokenized real-world assets such as funds, Treasury instruments, and gold; decentralized autonomous organizations; blockchain-based identity; and enterprise infrastructure.
Layer 2 networks extend these uses by processing transactions at lower cost while retaining a connection to Ethereum’s settlement layer. Wallets, custodians, exchanges, oracle providers, bridges, and developer tools further integrate with Ethereum standards.
Who is behind Ethereum and where is it based?
Ethereum was proposed by Vitalik Buterin in 2013. The whitepaper was published in 2014, followed by a public Ether sale that year. The first live network release, Frontier, launched on 30 July 2015.
The commonly identified early co-founders include Gavin Wood, Joseph Lubin, Charles Hoskinson, Anthony Di Iorio, Mihai Alisie, Amir Chetrit, and Jeffrey Wilcke, alongside Buterin. Wood authored the technical Yellow Paper, while Wilcke was associated with early client software. Current development is distributed across independent teams working on execution and consensus clients, including Geth, Prysm, Lighthouse, Teku, Nimbus, and Lodestar.
The Ethereum Foundation is a Swiss not-for-profit foundation associated with the project, with sources identifying Zug, Switzerland. Ethereum itself is not owned or operated by that foundation or by a single company. Developers, researchers, validators, node operators, and application teams around the world maintain the open-source network.
Tokenomics and supply
CoinStats reports a price of $2,684.16, a 24h change of +0.26%, a market cap of $327.72B (rank #2), and 24-hour volume of $18.83B. Circulating supply is 122,092,941 ETH and total supply is 122,092,941 ETH. The all-time high is $4,946.05, the current price is 45.73% below it.
There is no permanently fixed maximum supply. New ETH is issued as validator rewards, while EIP-1559 permanently burns each transaction’s base fee. Priority fees generally go to block proposers. During periods of heavy activity, burning can exceed issuance, while lower demand can result in net supply growth.
Consensus and security
Ethereum completed The Merge on 15 September 2022, changing from proof-of-work to proof-of-stake. A validator normally deposits 32 ETH and operates execution, consensus, and validator clients. Validators propose blocks and attest to transactions in 12-second slots and 32-slot epochs.
A checkpoint becomes final when at least two-thirds of the relevant staked ETH supports it. Inactivity penalties apply to unreliable validators, while conflicting proposals or attestations can trigger slashing, forced removal, and loss of staked ETH. This makes network security depend on capital at risk rather than mining hardware.
Ecosystem integrations and roadmap
Ethereum integrates with stablecoin issuers including Tether, Circle, and Paxos, as well as wallets, custodians, exchanges, Layer 2 networks, and institutional infrastructure. BlackRock’s BUIDL tokenized fund launched on Ethereum, Visa includes Ethereum in its stablecoin settlement program, and JPMorgan has developed tokenization initiatives connected to Ethereum-related infrastructure.
Pectra went live on 7 May 2025, raising the maximum effective validator balance to 2,048 ETH and increasing blob capacity. Fusaka followed on 3 December 2025 with PeerDAS and mechanisms for adjusting blob capacity. Glamsterdam was in development for a potential Q4 2026 mainnet period, with proposed work on proposer-builder separation, block-level access lists, gas pricing, and further scaling.
Ethereum’s main advantages are its broad developer ecosystem, established token standards, deep application liquidity, open participation, and role as a settlement layer for Layer 2 networks. Its trade-offs include architectural complexity, Layer 2 fragmentation, and concentration risks among large staking providers and custodians.