A breakdown of the 94K+ companies running Microsoft Exchange Online.
Top industries
Professional and business services12K+
Construction and building12K+
Health and wellness8.5K+
Art, sports and recreation7.7K+
Industrial and manufacturing7.5K+
Financial services7.4K+
Hospitality and travel5.3K+
Education and training4.6K+
No industry recorded: 21
Company size
1–1046,937 (61%)
11–5019,721 (26%)
51–2506,206 (8%)
251–5001,041 (1%)
501–1,000630 (1%)
1,001–5,0001,045 (1%)
5,001–10,000338 (<1%)
10,001+516 (1%)
Share of companies with a recorded size, by employees.
No size recorded: 17K+
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Frequently asked questions
About the Microsoft Exchange Online data on this page.
How many companies use Microsoft Exchange Online?
Firmable holds confirmed Microsoft Exchange Online detections for 94,136 distinct companies, 23 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 Online?
Catapult Health, ITMA - IT Management Associates and Coastalslns are among the most prominent in the current set.
What industries use Microsoft Exchange Online?
Professional and business services, construction and building and health and wellness lead the set, across 19 industries in total.
What size companies use Microsoft Exchange Online?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are Microsoft Exchange Online users based?
Australia, the United States, New Zealand and the Philippines account for most detections, across 13 countries.
How current is this data?
23 companies were confirmed in the last 90 days. Last detection 13 October 2026.
