Yawn. Yet another tech answer to what isn't a tech problem to start with. I suspect there will be gazillions more coming your way over the next few months because all the Silicon Valley entrepreneurs want to milk that market before people realise they've been had: IT IS NOT A TECHNICAL PROBLEM.
For a US based company it is 100% pointless to install any defence mechanism if some random official can walk in and ask for corporate data - the owner has to offer the data., unlocked.
For any organisation outside the US, it should simply ask the question: what are the chances that a US based organisation will NOT have a backdoor in its technology if such can be legally prescribed? As you have seen with Lavabit and Silent Circle, there are in principle only two ways forward: comply, or close shop. I leave you to note the clear risk in using security products from those who provide security products who have not closed down yet. Note: I'm not stating that all US sourced security products HAVE been provided with a backdoor, merely that it is legally possible to force the suppliers to implement them.
Eventually, someone will realise the real risk to the US economy: it's a profound lack of trust. This will take decades to fix, mainly because it involves a fight to either repeal those emergency laws or introduce some independent transparency and supervision. Meanwhile, whole swaths of Silicon Valley people will continue to sell what is at best privacy theatre, but which also risks becoming nothing more than security theatre as well.
Because backdoors and security do not combine very well.