12/11/2025
The Base chain ecosystem — developed by Coinbase — was officially launched to the public on August 9, 2023.
🧱 February 23, 2023 – Coinbase announced Base as a new Ethereum Layer 2 (L2) network built on Optimism’s OP Stack.
🔧 July 13, 2023 – Base opened for developers to deploy and test applications (the “Builder Testnet” and early mainnet access).
🚀 August 9, 2023 – Base Mainnet went live for everyone, marking the full public launch of the Base ecosystem.
Since then, Base has rapidly grown into one of the most active L2 networks, hosting DeFi apps, NFT projects, and new on-chain social protocols like Farcaster and Friend.tech