I'd be surprised if any of the big companies didn't provide at least 401K and as much matching as the law will allow. There really isn't a lot of freedom to innovate in this space that I'm aware of.

With that said, Google did have this odd thing where you could do an in-plan Roth conversion, and put post-tax dollars into your 401K. I did this in 2013 or 2014, and I think Google was one of the few companies to offer this at the time.

One interesting area of differentiation is health care. When I left Google in 2015, they were cutting health benefits to avoid Cadillac plan taxes. Lots of people were saying that Facebook had better plans.

Unfortunately, we don't have that information right now. We could try to find out. It just wasn't part of the compensation data that the people on Hacker News had posted.