Google alone had 2.5 million servers in 2016 as per estimate [1], and 0.9 million in 2011 in [2]. So a reasonable guess for today seems > 5 million. [1] https

Google alone had 2.5 million servers in 2016 as per estimate [1], and 0.9 million in 2011 in [2]. So a reasonable guess for today seems > 5 million. [1] https://en.wikipedia.org/wiki/Google_data_centers https://en.wikipedia.org/wiki/Google_data_centers [2] https://www.datacenterknowledge.com/archives/2011/08/01/report-google-uses-about-900000-servers https://www.datacenterknowledge.com/archives/2011/08/01/repo...