GhostTalkie is a free Chrome extension that facilitates peer-to-peer chat using Web3 wallet identities. Users can engage in anonymous text and voice conversations without the need for traditional servers, ensuring a high level of privacy. By connecting their Ethereum wallet, participants can instantly chat by signing a cryptographic proof, making impersonation impossible. The extension supports multiple blockchains like Ethereum, Arbitrum, and Polygon, and allows users to leave comments on wallet profiles even when the owner is offline, utilizing decentralized Nostr relays for message storage.

The extension prioritizes user privacy, operating without any backend infrastructure or tracking mechanisms. Chat messages exist only during the session and are never stored, while voice chat requires microphone access only when activated. GhostTalkie also includes features such as wallet searching, token transfers, and bookmarks for quick access to frequently contacted wallets. Overall, it offers a seamless and secure communication experience for users in the NFT marketplace.