Any GUI Linux directory comparison tools that work?

I tried KDIFF3, it crashes partway through comparison. I understand that v1.10 has a bug and crashes when a directory has symlinks in it, as my home folder does.

I tried KDIFF3 v1.12 via the abomination called Flatpak, but it also crashes partway through scanning.

I tried MELD, it just hangs there "scanning" but uses no CPU and is doing nothing...

Ideas?

#Linux

@dancingtreefrog beyondcompare from scootersoftware, but it is not for free and not opensource, I am using it since 1997, it is very reliable and synchronizes even large files (> 2 GByte) or many files (> 100.000) without any problems, even over poor internet connections e.g. via ftp. Most tools crash with those requests. It has a simple scripting engine also.

#filecomparison #foldercomparison #textcomparison #synchronisation #backup

@Andreas_Sturm Thanks, never heard of it, but I'll pass.