Bluesky Social is a decentralized social media platform that emerged from an initiative within Twitter Inc. to develop a decentralized social network protocol', now known as the AT Protocol, the standard on top of which the Bluesky operates. It is a text-oriented social media platform on which users can post messages as long as 300 characters, similar to Twitter. Bluesky is accessible via a web browser or an app for iOS and Android, and it operates its own social network, Bluesky Social. The service is in an invite-only beta, but the company has specified plans to open it up to the general public later. Bluesky is a decentralized, invite-only social network built on an open-source protocol. The platform operates on an open framework, meaning that users can post their messages to a server. As of September 12, 2023, Bluesky has 1 million users.