What are some alternatives?
When comparing TeraCopy and Beyond Compare, you can also consider the following products
Ultracopier - SuperCopier replaces Windows explorer file copy and adds many features: Transfer resuming, transfer...
FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
Robocopy - Robocopy is a free file copy tool that is included with the Microsoft Windows operating system. It allows one to construct complicated instructions to move, or copy files.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
FastCopy - FastCopy is the fastest copy, delete, & sync software on Windows.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.