Google, which invests a significant amount of dollars and resources into consumer marketing, seems to have the most stable consumer relationship heading into this week’s hearings. And unlike Facebook, which does very little consumer marketing, the public has a less visible look into how fake news spreads on Google properties.

Twitter’s last testimony on Capitol Hill didn’t exactly win over lawmakers. But its biggest problem is the proliferation of bot accounts on its platform. Earlier this year, a University of Southern California and Indiana University study found that up to 15% of active accounts on Twitter are bots.