We Heart It, a photo-oriented social network, now has about 25 million users every month, 80% of which are under the age of 24, and more than 50% of which are in their teens. With a such a youthful user base it’s no suprise that the startup has partnered Teen Vogue and others. 

Lots of companies spend large amounts of money and time trying to attract the lucrative but elusive young demographic. So when something organically emerges as a trend-setting app for young people, it can be a pretty special thing.