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

The encryption genie is out of the bottle.

Our phones are so intimately connected to us, to our lives. Putting advertising on a device like that is a bad idea. You don't want to be interrupted by ads when you're chatting with your loved ones.

When I was a kid trying to communicate with family in the Soviet Union, it was very difficult. You had to go through the long-distance phone companies like MCI, which were difficult to navigate and expensive to make calls through.

The message growth rate in Brazil - it's not like a hockey stick: it's like a vertical line.

As long as our user base continues to grow, at some point it will have critical mass, and at some point it will tip, and at some point, people will just have to use WhatsApp because their friends are using WhatsApp.