This article was been published more than a year ago. The information may be outdated.
Since 2011, EFF, the Electronic Frontier Foundation, has published an annual report, “Who has your back“, detailing how a number of different companies deal with government data requests. 2014 is no exception, and the report came out a few weeks ago.
New to the report are Adobe, the Internet Archive and Snapchat, to mention a few, and everyone on the list have been checked for updates since the last report. In general, most companies protect you fairly well, with Apple, Dropbox, Google and a few others receiving full marks.
The report is an interesting read, if you care about these things, and worth a gander.