A breakdown of the 315 companies running Inbox Guru.
Top industries
Construction and building44
Professional and business services40
Real estate and home services33
Transport27
Information technology and services25
Health and wellness19
Industrial and manufacturing16
Art, sports and recreation13
No industry recorded: 33
Company size
1–1065 (58%)
11–5027 (24%)
51–25010 (9%)
251–5004 (4%)
501–1,0004 (4%)
1,001–5,0002 (2%)
5,001–10,0001 (1%)
Share of companies with a recorded size, by employees.
No size recorded: 202
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Frequently asked questions
About the Inbox Guru data on this page.
How many companies use Inbox Guru?
Firmable holds confirmed Inbox Guru detections for 315 distinct companies, 269 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Inbox Guru?
Oliver Packaging & Equipment, CFP Board and Call2recycle are among the most prominent in the current set.
What industries use Inbox Guru?
Construction and building, professional and business services and real estate and home services lead the set, across 17 industries in total.
What size companies use Inbox Guru?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are Inbox Guru users based?
The United States, Canada, Australia and New Zealand account for most detections, across 13 countries.
How current is this data?
269 companies were confirmed in the last 90 days. Last detection 13 October 2026.
