“There was an attitude these were great American companies that created jobs and that we should have a hands-off approach and let them flourish,” Mr. Cicilline said in an interview. “But there are a lot of serious issues we have uncovered over the course of the investigation that weren’t apparent when we first began investigating.”Facebook, Amazon, Google and Apple declined to comment.For the chief executives, the hearing will be a test of how they perform under fire. Mr. Bezos, 56, has not previously testified to Congress, while Mr. Cook, 59, and Mr. Pichai, 48, have both testified once before. Mr. Zuckerberg, 36, the youngest of the group, has the distinction of being the veteran: He has answered questions at three congressional hearings in the past two years as Facebook has dealt with issues such as election interference and privacy violations.
But none are taking any chances for the event to go awry. Mr. Zuckerberg, who had been at his 750-acre estate on the Hawaiian island of Kauai, has been preparing for his testimony with the law firm WilmerHale, according to people with knowledge of the matter. And a small team is working with Mr. Bezos for his testimony in Seattle, said people with knowledge of the matter.For weeks, the tech giants have also waged a lobbying battle to soften any blows. All four chief executives planned to call lawmakers on the House subcommittee in the days before the hearing, said three people with knowledge of the preparations who were not authorized to speak publicly.
When users sign in with their Google or Facebook Inc profiles to third-party apps, the apps often share valuable data with Google and Facebook, a practice that Apple is looking to stop. Bajarin said Apple appears to be working to “firewall” off its customers from data collection practices it disagrees with.
Apple and Amazon also recently released studies to rebut claims of market dominance and anticompetitive practices. Last week, Apple publicized a study by a consulting firm called Analysis Group showing that the 30 percent commission it charges many apps for the right to appear on iPhones is close to what other platforms charge for distribution. The study left out that Apple helped popularize that 30 percent standard across the industry.