It's interesting that I can't reel off Windows equivalents of those companies. Where are the companies that embrace the and celebrate the Windows platform like Panic or Omni Group?
There really is very little to celebrate in Windows. OSX had/has a belief in quality (even if Apple didn’t always live up to it, and lately they’ve shredded the HIG altogether) that inspired devotion in a way Windows never could.
In addition, OSX has always had a strong culture of customers willing to pay for quality software, that has allowed independent smaller companies to flourish. There is no such equivalent in Windows. The Windows culture appears to be one of providing shareware, that was cracked and used for free by individuals, and developers were ok with it because they actually made money from enterprise users who would pay up.
Not a multi-person company like the ones mentioned but Bvckup https://bvckup2.com/ and its developer comes to mind, especially for their dedication and attention to detail https://bvckup2.com/wip/