A breakdown of the 41 companies running Postach.io.
Top industries
Information technology and services7
Professional and business services7
Construction and building4
Health and wellness4
Education and training3
Not for profit2
Agriculture, forestry and fishing1
Consumer services1
No industry recorded: 8
Company size
1–1010 (45%)
11–507 (32%)
51–2504 (18%)
251–5001 (5%)
Share of companies with a recorded size, by employees.
No size recorded: 19
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Frequently asked questions
About the Postach.io data on this page.
How many companies use Postach.io?
Firmable holds confirmed Postach.io detections for 41 distinct companies, 30 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Postach.io?
Korea International School, Jeju Campus, Pctronics and Genius House Media are among the most prominent in the current set.
What industries use Postach.io?
Information technology and services, professional and business services and construction and building lead the set, across 13 industries in total.
What size companies use Postach.io?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are Postach.io users based?
The United States, Canada, Australia and Japan account for most detections, across 10 countries.
How current is this data?
30 companies were confirmed in the last 90 days. Last detection 13 October 2026.
