A breakdown of the 948K+ companies running Microsoft IIS.
Top industries
Professional and business services89K+
Information technology and services76K+
Art, sports and recreation70K+
Industrial and manufacturing67K+
Construction and building55K+
Hospitality and travel51K+
Health and wellness49K+
Financial services48K+
No industry recorded: 163K+
Company size
1–10149,756 (31%)
11–50134,797 (28%)
51–250123,687 (25%)
251–50042,821 (9%)
501–1,00013,953 (3%)
1,001–5,00019,393 (4%)
5,001–10,0002,797 (1%)
10,001+2,545 (1%)
Share of companies with a recorded size, by employees.
No size recorded: 459K+
Versions detected
10 versions across the confirmed companies. Counts are distinct companies seen running that version.
10.0161K+
8.519K+
7.58.4K+
8.03K+
6.01.7K+
7.01.3K+
5.0276
5.145
27.8718
10.512
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Frequently asked questions
About the Microsoft IIS data on this page.
How many companies use Microsoft IIS?
Firmable holds confirmed Microsoft IIS detections for 948,877 distinct companies, 572,534 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Microsoft IIS?
Cresset, Mirum Pharmaceuticals Inc. and Viant are among the most prominent in the current set.
What industries use Microsoft IIS?
Professional and business services, information technology and services and art, sports and recreation lead the set, across 19 industries in total.
What size companies use Microsoft IIS?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are Microsoft IIS users based?
The United States, Canada, Australia and Singapore account for most detections, across 13 countries.
How current is this data?
572,534 companies were confirmed in the last 90 days. Last detection 14 October 2026.
