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.

Jan Koum

We need to make sure that organisations like WhatsApp - and there are plenty of others like that - don't provide a secret place for terrorists to communicate with each other.

Amber Rudd

The laws of business physics have been broken in terms of how many customers you can acquire and how fast. No one in history has ever acquired 450 million customers in the same amount of time that WhatsApp did.

Ben Horowitz

What is astonishing is that globalised technology, like Whatsapp and Viber, really gives a lot of leeway to negotiating spaces and to keeping one's identity. So people are able to be more receptive as a gay community to be part of an environment that is going to challenge the law.

Binyavanga Wainaina

'WhatsApp' provides phone number-based messaging, and people asked, 'Isn't that what SMS is?' Yes, but SMS is expensive, antiquated, and what WhatsApp did was modernize and level that playing field.

Brian Acton

When I joined 'WhatsApp,' I was 38 years old. Opportunity is available to us in all walks of life and at all ages.

Brian Acton

WhatsApp provides phone-number-based messaging, and people asked, 'Isn't that what SMS is?' Yes, but SMS is expensive, antiquated, and what WhatsApp did was modernize and level that playing field. For example, in Europe, if France wants to talk to Belgium, it's extraordinary costly because of border and telecom charges.

Brian Acton

In early 2010, we launched our first localized version of 'WhatsApp' for iPhone. It included Spanish and German language translations, to name a couple.

Brian Acton

WhatsApp will bring Facebook another billion users. We will be a billion-user product. Whether there is a direct valuation or an indirect valuation, there is value, and Facebook understands that well.

Brian Acton

I connect with my culture through my family. I speak Portuguese to my parents so that I can practice. I stay engaged with my extended family through a lively group chat on WhatsApp. That sense of community and family is the heart of Brazilian culture, and staying engaged with my family is what keeps me connected.

Camila Mendes

I still speak every day on my WhatsApp to the girls I was in 'Strictly' with.

Caroline Flack

As long as I can make a phone call and do a WhatsApp, I'm fine.

Christine McVie

WhatsApp I adore. I use it all the time with my friends.

Christine McVie

I think what I notice now is that a lot of the things that are said to us on camera on air are not particularly believed and quite often not true and its an extraordinary position to be in when you've had WhatsApp messages, text messages off record.

Emily Maitlis

I think I was the last teenager to get WhatsApp.

Frenkie de Jong

Everybody knows that footballers have text groups on WhatsApp. I have one just for my friends from home, and I have another just for my Barca team-mates.

Gerard Pique

If you get a WhatsApp message, you're probably going to open it. That's the interesting thing.

Harper Reed

WhatsApp has over a billion customers, and they are overwhelmingly good people. But in that billion customers are terrorists and criminals... It's a huge feature of terrorist tradecraft.

James Comey

Users get unlimited 'WhatsApp'. We get happy users who don't have to worry about data. Carriers get people willing to sign up for data plans.

Jan Koum

Pavel Durov only knows how to copy great products like Facebook and 'WhatsApp'; he never had and will never have original ideas.

Jan Koum

I only have one idea, that is WhatsApp, and I am going to continue to focus on that. I have no plans to build any other ideas.

Jan Koum