The results are in on the Electronic Frontier Foundation's fourth annual "Who Has Your Back" report on the tech sector's customer privacy practices. The highest ratings—companies given six stars—were handed to Apple, Credo Mobile, Dropbox, Facebook, Google, Microsoft, Sonic, Twitter, and Yahoo. The report, released Thursday, reviewed 26 companies in all, rating them on everything from whether they require warrants for data handovers to whether they have publicly opposed mass surveillance and fight for "users' privacy rights in courts." The study found that Snapchat, AT&T, and Comcast lagged "behind others." Snapchat was among the biggest privacy underachievers, earning one star. "This is particularly troubling because Snapchat collects extremely sensitive user data, including potentially compromising photographs of users.