Digital ocean are a hosting platform. They came into the spot light a year or two ago as offering cheap VPS hosting.
They also give you the standard setup images, scaling, etc.
I asked the question as i was on there website earlier and I had seen the counter with the number of nodes setup so far; and thought I wonder what the largest site is on there.
They are also on the front of hacker news today as they have just completed a new funding round https://news.ycombinator.com/item?id=7353868
Oh and forgot they also only offer SSD disks.