It’s fast, being able to handle simultaneous transmissions (multi-threaded transfers), and supports SFTP and FTPS (which stands for FTP over SSL). Topping the list is FileZilla, an open source FTP client. The five free FTP clients that made our list include: 1. Has a GUI: There are some awesome FTP clients with a command-line interface, but for a great number of people, a graphical user interface is more approachable and easier to use.SFTP (which stands for SHH File Transfer Protocol) is a popular secure alternative, but there are many others. If your data is compromised en route to its destination, your credentials (username and password) and your data can easily be read. Among its many flaws, plain FTP doesn’t encrypt the data you’re transferring. Supports secure file transfer protocols: FTP isn’t secure.
When I was putting together this list, this was my criteria: How we created this list of the best free FTP software applications
