A breakdown of the 234 companies running Inbox Monster.
Top industries
Information technology and services35
Retail trade32
Art, sports and recreation31
Media and telecommunications22
Professional and business services19
Hospitality and travel18
Not for profit12
Financial services8
No industry recorded: 16
Company size
1–1019 (11%)
11–5037 (21%)
51–25057 (32%)
251–50029 (16%)
501–1,00010 (6%)
1,001–5,00014 (8%)
5,001–10,0006 (3%)
10,001+6 (3%)
Share of companies with a recorded size, by employees.
No size recorded: 56
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Frequently asked questions
About the Inbox Monster data on this page.
How many companies use Inbox Monster?
Firmable holds confirmed Inbox Monster detections for 234 distinct companies, 228 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Inbox Monster?
Penske Media Corporation, Affinitiv and SoundCloud are among the most prominent in the current set.
What industries use Inbox Monster?
Information technology and services, retail trade and art, sports and recreation lead the set, across 17 industries in total.
What size companies use Inbox Monster?
Adoption concentrates in the 51-250 employee band, across the companies whose size is recorded.
Where are Inbox Monster users based?
The United States, Australia, Canada and the Philippines account for most detections, across 13 countries.
How current is this data?
228 companies were confirmed in the last 90 days. Last detection 13 October 2026.
