. >> benedict evidence of andreessen horowitz, ben thompson of stratechery.will be back with more. ♪ billion price$19 tag for whatsapp shocked many. was it a huge surprise to whatsapp's competitors? i want to bring in a special roundtable of whatsapp competitors. the cofounder and cto of tango. whoa whenrybody went this was announced, but what did you guys think? >> the sheer number of the purchase, when you factor in the rs you -- rsu for keeping employees. when you divide it by the active number of users it's only about $40 a user. when you factor in the growth in the growth and add one million users a day, you are looking at outng them out a few years $20 a user. you're talking about something realistic in terms of being a good return on investment. one of the reasons it surprised people here was because they have an app used mostly overseas. a lot of people in the u.s. have not heard of them or use them. >> i have tried to use it personally, but not enough of my friends here have it. people do communicate with me from abroad. what was your reaction? >> wh

i spoke with ben thomson, an author, who joined me from taiwan and andreessen horowitz partner benedictvans. i asked them if whatsapp is worth the price tag? >> it's a bit like the instagram acquisition. was instagram worth $1 billion or 1% of facebook at the time? the question for mark zuckerberg is around maintaining share engagement and share of social activity. whatsapp now has 450 million active users, 70% of them active every day. that is a significant advantage of facebook users. whatsapp is taking a big chunk of people who should have been using facebook and they are using facebook first. the question for him was do you just sit and try and compete with that? they have been looking at facebook message for the last year or so and that has not stopped the clock. -- whatsapp from gorwing. you might say this is a great mobile conversation and that should be part of facebook. >> looking at the landscape of mobile messaging apps, you are in taiwan and you have seen the rise of wichat and others. do you think this is worth it? >> i tend to think it is. i think the price per user is ver