If they did, they’d get extra space for free on their own account for every new person who signed up from one of their invites. Here’s how it worked: Dropbox users were encouraged to share the service via social media and e-mail. This ended up being one of the keys to their success. Thus, they decided to switch to a viral referral campaign to attract more customers. That ended up being too expensive for what was a $99 product at the time. But they quickly figured out that they were spending $233 to $388 per customer acquired. So what was Dropbox’s secret? How did they grow so quickly with such a simple design, one explainer video, and spending no money on advertising?ĭropbox started out by using Google AdWords as a way to reach customers. They’ve also grown without spending money on advertising, and they’ve grown exponentially compared to the competition, despite the fact that there are dozens of similar services competing in the same space. Here’s what it looks like (just in case you weren’t one of the first 100 million people who has already signed up for the service): Since the first year, their homepage has featured only two main components-an explainer video and a download button. What’s even more impressive, is the fact that they’ve done it with one of the most simple website designs ever. In May 2014, Dropbox reached 300 million users. From 2007 to 2012, Dropbox grew from 0 to 100 million users.