https://www.theregister.co.uk/2020/01/02/amazon_google_microsoft_who_had_the_best_year_in_cloud_in_2019/

Analysis Three technology giants continued to dominate cloud computing in 2019, with each bringing in some interesting tools to play with as they sprawled over smaller players.

The big picture did not change radically in 2019. All the big three cloud providers (or big four if you consider Alibaba’s growth in East Asia) continued to grow at a dramatic pace. In the quarter ending September 30 2019, AWS reported 34 per cent revenue growth and Microsoft Azure 59 per cent growth compared to the same quarter a year ago. Google did not offer an exact figure for the quarter but said that (PDF): “Other revenues for Google were $6.4bn, up 39 per cent year-over-year, once again fuelled by cloud.”