LocalSend is described as 'Free, open-source, cross-platform file-sharing tool designed to securely share files and messages with nearby devices over your local network without needing an internet connection. Here are some of its key features:' and is a very popular large file transfer service in the file sharing category. There are more than 100 alternatives to LocalSend for a variety of platforms, including Windows, Android, Web-based, Mac and Linux apps. The best LocalSend alternative is KDE Connect, which is both free and Open Source. Other great apps like LocalSend are PairDrop, OnionShare, Blip and Send.