A breakdown of the 5K+ companies running InterServer.
Top industries
Professional and business services595
Art, sports and recreation451
Information technology and services450
Construction and building329
Health and wellness249
Retail trade228
Financial services211
Media and telecommunications210
No industry recorded: 952
Company size
1–10788 (52%)
11–50476 (31%)
51–250185 (12%)
251–50030 (2%)
501–1,00012 (1%)
1,001–5,00017 (1%)
5,001–10,0004 (<1%)
10,001+2 (<1%)
Share of companies with a recorded size, by employees.
No size recorded: 3.4K+
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Frequently asked questions
About the InterServer data on this page.
How many companies use InterServer?
Firmable holds confirmed InterServer detections for 5,011 distinct companies, 4,773 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use InterServer?
SIATech, Real Estate Authority (REA) and Catholic Answers are among the most prominent in the current set.
What industries use InterServer?
Professional and business services, art, sports and recreation and information technology and services lead the set, across 19 industries in total.
What size companies use InterServer?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are InterServer users based?
The United States, Canada, Australia and the Philippines account for most detections, across 13 countries.
How current is this data?
4,773 companies were confirmed in the last 90 days. Last detection 13 October 2026.
