The bosses of Facebook, Amazon, Apple and Google have been defending themselves against claims they're too rich, and have too much power.
Mark Zuckerberg, Jeff Bezos, Sundar Pichai and Tim Cook have appeared in front of a committee of politicians in the US.
They’re considering tougher competition rules for giant tech firms.
Mr Bezos says he comes from a humble background, and insists customers are at the heart of what he does.
Visit our Covid-19 info hub for the latest news and information on the Covid-19 pandemic.