Everyone knows (or ought to know) that the value of most of those perks has to be offset against something in the company's budget. (Namely: your paycheck[1]).
(New) startups shouldn't try to compete 1-1 with the handful of already stupendously successful startups on these items.
Far better to offer something the big boys can't: like actual responsibility (the kind that by definition, always comes with the act of taking on substantial risk); real challenge; and an opportunity (and expectation) to not only see, but contribute strategically to the whole picture -- including things like business strategy, shaping the company's hiring & general social culture, etc. Not to mention things like decent office space, lack of bureaucracy that's inevitable in any large organization, etc.
Those are what I call real perks -- not free massages, a treacly beer keg, or mediocre sushi (half price after 4p!)
[1] Actual benefits, like health insurance and paid training, are an entirely different matter of course. In these areas, the employer contribution (at scale) has a decisive leveraging benefit (i.e. generally providing more than what the employer could for herself out of pocket, dollar for dollar). But most of these fashionable "perks" out in startupland have dubious benefit at best -- and most of them I'd happily trade for the (implicit) negative offset in walking around money that goes with them.