A decade after its founding, Dropbox has filed to go public. The adored and easy-to-use (if somewhat stagnant) file-syncing service had documents disclosed to the SEC revealing plans for an initial public offering, where Dropbox is looking to raise up to $ 500 million. The company will trade on Nasdaq under the symbol "DBX."

Thanks to its first public filing, we're finding that the company's revenue has increased over the past three years, growing from $ $603 million in 2015 to $ $1.1 billion last year. And while Dropbox lost money overall over all those years, it has been losing less and less, falling from a loss of $ 326 million in 2015 to $ 111.7 million last year.

Dropbox has done very well over the past two years. In 2016, it had 6.5 million paying users. It doubled that in two years, to 11 million. Dropbox says 90 percent of its revenue comes from users buying a subscription on their own. That suggests it hasn't made much headway with enterprises, but also that it has plenty of room to grow if it can tap them.

Dropbox was founded in 2007 and launched to the public in 2008, when it immediately became a hit, thanks to how simple it was to sync files. While it's still hard to beat Dropbox's simplicity, the company hasn't done much to expand in the last 10 years. Its core product is pretty much the same, and while it is also added a collaborative document editor is also a product offered by many much larger competitors.

Recently, Dropbox started adding tools that could attract independent artists . It also launched a rebranding effort, which can be summarized as "the Dropbox logo, but in contrasting colors." It is well .

The numbers revealed today show that Dropbox is doing well with customers who already love its product; but its continued success depends on whether it can continue to find users as Apple, Microsoft and others improve their own file-syncing products and the online productivity suites that go with them. Dropbox also faces a lot of competition in the business world, against, among others, the similarly named Dropbox, which is already popular with large enterprises.