A breakdown of the 85 companies running DomainKeys Identified Mail.
Top industries
Information technology and services14
Professional and business services12
Industrial and manufacturing10
Art, sports and recreation8
Education and training5
Media and telecommunications5
Construction and building4
Financial services4
No industry recorded: 8
Company size
1–1017 (29%)
11–5014 (24%)
51–25012 (21%)
251–5006 (10%)
1,001–5,0004 (7%)
10,001+5 (9%)
Share of companies with a recorded size, by employees.
No size recorded: 27
One dataset. Four ways to sell.
Match the deepest technology intelligence against the most comprehensive data on companies and people – such as who is growing, raised capital or changed role – for pinpoint precision on GTM campaigns.
Competitor displacement
Find the accounts running a competitor today and go after them with the right argument.
Complementary tools
Target companies whose stack sits alongside yours and integrates without a fight.
Service partners
Identify implementers and agencies already working in the technologies you support.
Market insights
Map your total addressable market and track aggregated trends such as AI maturity.
Frequently asked questions
About the DomainKeys Identified Mail data on this page.
How many companies use DomainKeys Identified Mail?
Firmable holds confirmed DomainKeys Identified Mail detections for 85 distinct companies, 62 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use DomainKeys Identified Mail?
Walker Products Inc., Rapid Micro Biosystems and AACSB are among the most prominent in the current set.
What industries use DomainKeys Identified Mail?
Information technology and services, professional and business services and industrial and manufacturing lead the set, across 17 industries in total.
What size companies use DomainKeys Identified Mail?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are DomainKeys Identified Mail users based?
The United States, Japan, Australia and Canada account for most detections, across 13 countries.
How current is this data?
62 companies were confirmed in the last 90 days. Last detection 6 September 2026.
