Farcaster is a social protocol based on the OP Stack that allows users to sign up if they have an ETH wallet. 2021, Farcaster received a $30 million angel round led by A16Z. 2024, Farcaster announced that it had closed a $150 million round of funding led by Paradigm. The round was led by Paradigm with participation from a16z crypto, Haun, USV, Variant, Standard Crypto and others.