Dropbox Files for $500 Million IPO The cloud storage company filed the paperwork on Friday. The company has made $1.1 billion in sales and $845 million in 2017 and 2016 respectively. Since the company was founded in 2007, many other competitors, like Google Docs, have encroached on the market. According to The Wall Street Journal, the company was valued at $10 billion in 2014.