From Wikipedia, Ethereum. Original author(s)Vitalik Buterin, Gavin WoodDeveloper(s)Ethereum Foundation, Hyperledger, Nethermind, OpenEthereum, EthereumJSInitial release30 July 2015; 6 years agoStable releaseLondon / 5 August 2021; 15 days agoDevelopment statusActiveSoftware usedEVM 1 BytecodeWritten inGo, Rust, C#, C++, Java, PythonOperating systemCross-platformPlatformx86-64, ARMSize300 GB (2020-03)TypeDistributed computingLicenseOpen-source licensesActive hosts10,335 (2021-01)Websiteethereum.org

Ethereum is a decentralized, open-source blockchain with smart contract functionality. Ether (ETH or Ξ) is the native cryptocurrency of the platform. After Bitcoin, it is the largest cryptocurrency by market capitalization.[1][2]. Ethereum was invented in 2013 by programmer Vitalik Buterin.[3] In 2014, development was crowdfunded, and the network went live on 30 July 2015.[4] The platform allows anyone to deploy permanent and immutable decentralized applications onto it, with which users can interact.[5][6] Decentralized finance (DeFi) applications provide a broad array of financial services without the need for typical financial intermediaries like brokerages, exchanges, or banks, such as allowing cryptocurrency users to borrow against their holdings or lend them out for interest.[7][8] Ethereum also allows for the creation and exchange of NFTs, which are non-interchangeable tokens connected to digital works of art or other real-world items and sold as unique digital property. Additionally, many other cryptocurrencies operate as ERC-20 tokens on top of the Ethereum blockchain and have utilized the platform for initial coin offerings.

Ethereum has started implementing a series of upgrades called Ethereum 2.0, which includes a transition to proof of stake and aims to increase transaction throughput using sharding.[9][10]