Usage of operating systems broken down by SSL certificate authorities

This diagram shows the percentages of websites using various operating systems broken down by SSL certificate authorities. Cross-technology reports only include technologies with more than 1% usage to ensure statistical significance of the results. See technologies overview for explanations on the methodologies used in the surveys.

How to read the diagram:
Unix is used by 69.3% of all the websites whose operating system we know.
Unix is used by 89.3% of all the websites whose operating system we know and that use IdenTrust as SSL certificate authority.

Unix

69.3%

89.3%

81.1%

61.5%

48.2%

60.0%

Windows

30.7%

10.7%

18.9%

38.6%

51.9%

40.1%

W3Techs.com, 20 February 2019

Overall

Percentages of websites using various operating systems broken down by SSL certificate authorities
Note: a website may use more than one operating system

More details

You can find complete breakdown reports of 28 operating systems in our operating systems market reports.

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Technology Brief
Operating Systems
An operating system of a computer is the underlying program, that performs its basic user interactions and forms the basis of all other programs.

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