I hate spam, and that's what happens when you let businesses onto the network.

Everybody I meet who uses 'WhatsApp', I ask them a question: 'How did you hear about it?' And they say, 'My friends, my sister or my brother, somebody I know hounded me to install WhatsApp.' We think there is more power to the network when it grows organically.

In some ways, you can think of end-to-end encryption as honoring what the past looked like.

Utilities get out of the way. Can you imagine if you flipped a light switch and had to watch an ad before you got electricity? Can you imagine if you turned on a faucet and had to watch an ad before the water came out?

Nobody should have the right to eavesdrop, or you become a totalitarian state - the kind of state I escaped as a kid to come to this country where you have democracy and freedom of speech.

I grew up in a society where everything you did was eavesdropped on, recorded, snitched on. I had friends when we were kids getting into trouble for telling anecdotes about Communist leaders.