From Ask.fm to Secret, and from Whisper to Yik Yak, anonymous platforms that let people share or communicate in secret have seen explosive growth. But what happens if the anonymity is an illusion? With Whisper collecting data on its users, can it regain their trust?

One in ten Americans are clinically depressed. As busyness becomes a status symbol for Millennials, the stress is mounting. 'Text therapy' platform Talkspace appeals to a generation accustomed to immediate answers with a tap of a smartphone – but is it effective?

Many of us spend lunchtimes scrolling absent-mindedly through Facebook. Weddings, job announcements, trips abroad; you like a few photos and roll your eyes at some status updates. But what if a friend's updates suggest they're depressed? A new Facebook tool makes it easier to help.

Of the 45 million people diagnosed with mental health issues each year, less than 40% receive the help they need. With this in mind, mental health start-up Talkspace offers text-based counselling with a qualified therapist in exchange for a flat fee – anytime, anywhere.