20 of the world's hottest start-ups

So far, 2015 has been a great year for consumer tech. So we decided to take a look at the best startups that have launched so far this year.
To determine the best startups, we took into account factors like funding, revenue, growth, and investor interest.
Did we miss a great startup that launched this year? Let us know in the comments!
The entrepreneurial revolution is spreading to nearly every nook and cranny on the planet. Even countries plagued with political strife or in the midst of a deep recession are seeing a surge in start-up activity. These innovators bring ideas to life, drive economic growth and expand human welfare - and can be found