Reddit

Reddit’s year started out with a bang that lasted just five seconds, but its award-winning short Super Bowl ad set the pace for the following 12 months. A new round of funding in August boosted the company’s valuation to $10 billion. Its audience is up 44% year over year, and it posted its first-ever $100 million advertising revenue quarter, a 192% increase from the same period a year prior. It’s also flourishing outside the U.S. Its first international branding campaign piggybacked on its success since opening a U.K.