The CEOs tell Congress that the giant American tech companies do not stifle competition, saying the concern that too much power is concentrated in too few companies is unfounded.
Apple and Google are developing smartphone technology to help fight the coronavirus pandemic. But public health authorities in some states are chafing against the tech giants' rules.
Apple and Google are developing a tool that relies on Bluetooth signals, sent by smartphones, to let people know if they may have been exposed to the coronavirus.
U.S. companies are trying to limit disruption from the coronavirus outbreak by curtailing travel and telling some employees to work from home. Several major tech firms are among the latest to act.
Ending an era at the Internet's biggest search company, Google co-founders Sergey Brin and Larry Page end their leadership roles. Sundar Pichai will become CEO of Google and its parent, Alphabet.