content: All US companies are required to comply with valid subpoenas for information which, to my knowledge, has only happened...  Well that's the thing - part of the National Security Letter is that you can't tell anyone. It happens all the time but you don't hear about it. If you're in a country that's part of the Five Eyes, your info is ripe for the picking, and the FBI & NSA can get anything they want without a warrant. That would be:  US    Australia    UK    Canada    New Zealand     I'm pretty sure Israel has a similar agreement though they're not part of the Five Eyes.  In any of those countries, your info is absolutely not safe.