The Electronic Frontier Foundation has published its annual report Who Has Your Back? 2015: Protecting Your Data from Government Requests AT&T, Verizon and WhatsApp came out to be the worst companies in protecting its users data. Adobe, Apple, CREDO, Dropbox, Sonic, Wickr, WordPress.com, and Yahoo received the maximum number of starts demonstrating a great attention in both security and privacy of their users. Amazon, Google and Microsoft obtained only three stars each, a rate considered disappointing by privacy defenders and advocates.”]
Source: https://securityaffairs.co/wordpress/37969/digital-id/electronic-frontier-foundation-report.html