https://techcrunch.com/2018/07/27/the-cloud-continues-to-grow-in-leaps-and-bounds-but-its-still-awss-world/

With the big cloud companies reporting recently, we can be sure of a couple of things: the market continues to expand rapidly and AWS is going to be hard to catch. Depending on whose numbers you look at, the market grew around 50 percent as it continues its unprecedented expansion.

Let’s start with market leader, Amazon Web Services. Canalys has them with 31 percent of the market while Synergy Research puts them at 34 percent. That’s close enough to be considered a dead heat. As Synergy’s John Dinsdale points out, AWS is so dominant that in spite of mega growth numbers from other vendors, it is still bigger than the next four competitors combined, even after all these years.