As someone who has recently interviewed at most of those software related companies and got offers from most of them, I can confirm that some of these ranking s

As someone who has recently interviewed at most of those software related companies and got offers from most of them, I can confirm that some of these ranking seem really arbitrary. Amazon was definitely one of the easier interviews I had. Microsoft had one of the harder ones (but this might have just been a case by case thing). Jane Street and Palantir, however, I can say for sure had two of hardest and most intense interviews I've ever done. I've now learned, after being trained to conduct interviews, that these interviews aren't meant to be fair. Companies are afraid of getting any single person that isn't competent because people tend to hire others like them. A single bad person is a cancer. Thus, the hardest interviews are meant to reject 99% (or even more) of the qualified candidates so their false positive rates are ridiculously low. This is how scared these companies are of false positives.