Bluesky is a decentralized social network founded by former Twitter CEO Jack Dorsey. Built on the open-source AT Protocol, it lets users own their data, move accounts between platforms, and control the algorithms they see. After raising US $23 million in funding, Bluesky surpassed 13 million users and is valued near US $700 million. It’s positioned as a privacy-driven, creator-friendly alternative to X and Threads.