Optimism's Ethereum-based scaling solution has soft launched on mainnet January 15, 2021, 6:08PM EST • Ethereum
Ethereum's Layer 2 scaling solution Optimism plans to release its preliminary mainnet on January 15 January 4, 2021, 4:35AM EST • Ethereum
Ethereum scaling startup Optimism releases limited testnet of its Layer-2 solution September 25, 2020, 2:55AM EDT • Ethereum
