First off, what is a unicorn company? A unicorn company is a private company with a valuation of over $1 billion. We saw a rise in unicorn startups over the last few years but recently many are experiencing a drop-off from inflated valuations when facing the current macroeconomic environment. See who's facing layoffs or who remains as the fastest growing companies in the world below. Download the full list today to see each company's growth, hiring trends, valuation, investors, founders and more.