What are some alternatives?
When comparing FileZilla and PuTTY, you can also consider the following products
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
MobaXterm - MobaXterm is a software that uses a set of optimized network tools included in a single exe file. MobaXterm integrates several network clients with an X server, and also integrates a full set of Unix based commands. Read more about MobaXterm.
WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
ConEmu - ConEmu-Maximus5 is a full-featured local terminal for Windows devs, admins and users. Get better console window with tabs, splits, Quake style, copy+paste, DosBox and PuTTY integration, and much more.
Beyond Compare - Beyond Compare allows you to compare files and folders.
KiTTY - KiTTY is a fork from version 0.70 of PuTTY. It adds extra features to PuTTY.