http://www.newsweek.com/whatsapp-privacy-policy-update-alternative-secure-chat-apps-signal-telegram-1560084 > Chat apps including Signal and Telegram have enjoyed a surge in downloads this week as privacy conscious users seek alternatives to Facebook-owned WhatsApp over an updated policy about data sharing with the social network. > WhatsApp was acquired by the Mark Zuckerberg led company in 2014 for around $19 billion and has evolved into the world's most popular end-to-end encrypted messaging service, now used by more than two billion people in more than 180 countries.