A breakdown of the 528 companies running Mailinblack.
Top industries
Industrial and manufacturing126
Construction and building75
Professional and business services48
Art, sports and recreation25
Hospitality and travel25
Information technology and services21
Government and public services20
Financial services17
No industry recorded: 74
Company size
1–1035 (14%)
11–5087 (34%)
51–25082 (32%)
251–50018 (7%)
501–1,00018 (7%)
1,001–5,00010 (4%)
5,001–10,0003 (1%)
10,001+2 (1%)
Share of companies with a recorded size, by employees.
No size recorded: 273
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Frequently asked questions
About the Mailinblack data on this page.
How many companies use Mailinblack?
Firmable holds confirmed Mailinblack detections for 528 distinct companies, 502 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Mailinblack?
I Squared Capital, SIC Marking and GATTEFOSSÉ are among the most prominent in the current set.
What industries use Mailinblack?
Industrial and manufacturing, construction and building and professional and business services lead the set, across 19 industries in total.
What size companies use Mailinblack?
Adoption concentrates in the 11-50 employee band, across the companies whose size is recorded.
Where are Mailinblack users based?
The United States, Australia, Canada and Singapore account for most detections, across 13 countries.
How current is this data?
502 companies were confirmed in the last 90 days. Last detection 11 October 2026.
