A breakdown of the 52 companies running Microsoft Exchange 2003.
Top industries
Information technology and services22
Industrial and manufacturing6
Transport5
Professional and business services4
Financial services3
Government and public services3
Art, sports and recreation2
Hospitality and travel2
No industry recorded: 2
Company size
1–102 (4%)
11–5010 (20%)
51–25020 (40%)
251–5005 (10%)
501–1,0005 (10%)
1,001–5,0002 (4%)
5,001–10,0001 (2%)
10,001+5 (10%)
Share of companies with a recorded size, by employees.
No size recorded: 2
Versions detected
1 versions across the confirmed companies. Counts are distinct companies seen running that version.
6.5.7638.13
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Frequently asked questions
About the Microsoft Exchange 2003 data on this page.
How many companies use Microsoft Exchange 2003?
Firmable holds confirmed Microsoft Exchange 2003 detections for 52 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 Microsoft Exchange 2003?
Gransolar, Sl., Progent and Amini Innovation Corporation (AICO) are among the most prominent in the current set.
What industries use Microsoft Exchange 2003?
Information technology and services, industrial and manufacturing and transport lead the set, across 15 industries in total.
What size companies use Microsoft Exchange 2003?
Adoption concentrates in the 51-250 employee band, across the companies whose size is recorded.
Where are Microsoft Exchange 2003 users based?
The United States, Canada, Australia and Japan account for most detections, across 13 countries.
How current is this data?
6 companies were confirmed in the last 90 days. Last detection 25 September 2026.
