Ethereum is a decentralized global software platform powered by blockchain technology. It is most commonly known for its native cryptocurrency, ether (ETH).
Avalanche is a decentralized, open-source proof of stake blockchain with smart contract functionality. AVAX is the native cryptocurrency of the platform.
Optimism is a layer two protocol and smart contract platform that aims to enable low-cost and near-instantaneous Ethereum transactions.
Polygon (formerly Matic Network) is a blockchain platform that enables blockchain networks to connect and scale. It aims to create a multi-chain blockchain ecosystem compatible with Ethereum.
Arbitrum is a suite of Ethereum scaling solutions that enables high-throughput, low cost smart contracts while remaining trustlessly secure.