Share of companies with a recorded size, by employees.
No size recorded: 9
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Frequently asked questions
About the Castr data on this page.
How many companies use Castr?
Firmable holds confirmed Castr detections for 46 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 Castr?
MOSAEC are among the most prominent in the current set.
What industries use Castr?
Education and training, information technology and services and not for profit lead the set, across 15 industries in total.
What size companies use Castr?
Adoption concentrates in the 51-250 employee band, across the companies whose size is recorded.
Where are Castr 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 29 August 2026.
