No, there isn't, in case you haven't been paying attention.
When it comes to NSA, there is no "they" anymore. In the eyes of NSA, a company is not a whole, but rather a group of individuals that can face jail time, individually.
And yes, "legally" speaking, companies and individuals supposedly can fight back, but they are coerced into doing it in secret. Doing otherwise can lead to the labeling of individuals as national security threats or even potential terrorists, after which all gloves are off.
So let me ask you this - if the populace at large doesn't do anything, why do you expect a company of a few thousands to be up in arms about it? That's a really screwed double standard.