But if you compare the two tools to each other, I think 7-Zip has some clear benefits over WinRAR. One of the biggest benefits of 7-Zip is that it's free and open-source, making it a great free ...

The default choice is WinRAR, made by the developers of the RAR file format, but it isn't technically a free app, though you can continue to use it indefinitely after the trial period expires.