Zora

EFP is an on‑chain social graph protocol, enabling Ethereum users to "follow" or "tag" other addresses via NFT-powered lists. It complements ENS and Sign‑In with Ethereum (SIWE)—forming part of the emerging Ethereum identity stack

Ethereum Follow Protocol (EFP) is an onchain social graph protocol for Ethereum accounts that complements ENS.

Farcaster is a sufficiently decentralized social network built on Ethereum. It is a public social network similar to X and Reddit. Users can create profiles, post "casts" and follow others. They own their accounts and relationships with other users and are free to move between different apps.