When comparing GNU grep vs GrepWin, the Slant community recommends GrepWin for most people. In the question“What are the best grep implementations for Windows?” GrepWin is ranked 4th while GNU grep is ranked 6th. The most important reason people chose GrepWin is:
GrepWin is completely free and open source. It's released under GPL.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Great for people used to *NIX systems
Since it's pretty much the same grep used on UNIX systems, people who have used grep on any *NIX system will find themselves at home with the Windows version.
Pro It handles files of any size
At least in Linux.
Pro Free and open source
GrepWin is completely free and open source. It's released under GPL.
Pro RegEx support
Pro Portable Version
A portable version without installation is available.
Pro Can search hidden directories/files
GrepWin can also search for hidden directories or files with no problem.
Cons
Con Cannot handle files
When searching through files with 10MB or more it starts having issues and even crashes depending on the file size and the machine it's running on.
Con Can only search .txt files
Con No way to export the results
If one wishes to export the results from grep
into a text file or any other format, there's no way to do it with GrepWin.