Serv-U Managed File Transfer Server is described as 'FTP Server software (FTP, FTPS, SFTP, Web & mobile) for secure file transfer and file sharing on Windows & Linux. Download SolarWinds Serv-U for free now!' and is an app in the File Sharing category. There are three alternatives to Serv-U Managed File Transfer Server for Windows and Android. The best alternative is SwiFTP, which is both free and Open Source. Other great apps like Serv-U Managed File Transfer Server are FreeFTPd (Free) and SilverSHielD (Freemium).
freeFTPd is a FTP/FTPS/SFTP server that enables user to access remote files over TCP/IP network such as Internet. Unlike FTP, FTPS and SFTP protocols provide security and strong encryption of data - great for insecure network.
SilverSHielD is a free, feature-rich, award-winning SSH (SSH2) and SFTP server for Windows. Below you can read some of its features: Authentication Keyboard-interactive Password-based (also supports Windows/AD account authentication!