1. whatsapp
The US National Security Agency, he insists, has no access to users' messages. "People need to
differentiate us from companies like Yahoo! and Facebook that collect your data and have it
sitting on their servers. We want to know as little about our users as possible. We don't know your
name, your gender… We designed our system to be as anonymous as possible. We're not
advertisement-driven so we don't need personal databases.