.bit is a Singapore-based company that builds a cross-chain decentralized identity protocol. They provide self-sovereign data containers called .bit, which allow users to have ownership and control over their data. These containers can be used in various applications and can store different types of data. .bit also offers features such as .bit Alias, which provide additional security for asset transactions, and SubDIDs, which allow users to create multiple decentralized identifiers for management.