Lufi is described as 'Secure file sharing with end-to-end encryption. Files are encrypted within your browser. The encryption key is embedded in the URL, processed only on your device' and is a large file transfer service in the file sharing category. There are more than 100 alternatives to Lufi for a variety of platforms, including Web-based, Windows, Mac, Linux and Android apps. The best Lufi alternative is LocalSend, which is both free and Open Source. Other great apps like Lufi are Nextcloud, Dropbox, Google Drive and MEGA.