A breakdown of the 30 companies running EmailOpen.
Top industries
Information technology and services5
Media and telecommunications5
Professional and business services5
Hospitality and travel3
Art, sports and recreation2
Health and wellness2
Industrial and manufacturing2
Retail trade2
Company size
1–101 (3%)
11–503 (10%)
51–2504 (14%)
251–5003 (10%)
501–1,0001 (3%)
1,001–5,0008 (28%)
5,001–10,0002 (7%)
10,001+7 (24%)
Share of companies with a recorded size, by employees.
No size recorded: 1
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Frequently asked questions
About the EmailOpen data on this page.
How many companies use EmailOpen?
Firmable holds confirmed EmailOpen detections for 30 distinct companies, 6 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use EmailOpen?
Roundel, Comcast Advertising and Crowne Plaza Hobart are among the most prominent in the current set.
What industries use EmailOpen?
Information technology and services, media and telecommunications and professional and business services lead the set, across 13 industries in total.
What size companies use EmailOpen?
Adoption concentrates in the 1,001-5,000 employee band, across the companies whose size is recorded.
Where are EmailOpen users based?
The United States, Australia, Canada and the Philippines account for most detections, across 13 countries.
How current is this data?
6 companies were confirmed in the last 90 days. Last detection 5 September 2026.
