BIShare

Cross-platform file transfer, like AirDrop but between iPhone, Android, Mac, Windows and Linux. Files go directly between devices on the local network, end-to-end encrypted with X25519 and AES-256-GCM, with no account and no server in the path. For someone who is not nearby it makes an encrypted link of up to 100 GB that expires within a day; the relay only ever holds ciphertext. It also offers shared rooms, clipboard sync between a person's own devices, and receiving in a plain browser tab when the other side has nothing installed. Written in Flutter with a Rust core, and distributed through the App Store, Google Play, the Microsoft Store, the Snap Store and GitHub Releases. Live usage figures are public at https://bishare.app/stats.