A breakdown of the 186K+ companies running Microsoft Outlook.
Top industries
Professional and business services22K+
Industrial and manufacturing22K+
Construction and building21K+
Information technology and services16K+
Health and wellness16K+
Financial services15K+
Education and training9.3K+
Art, sports and recreation7.2K+
No industry recorded: 7.4K+
Company size
1–1014,362 (8%)
11–5034,522 (20%)
51–25062,877 (37%)
251–50030,707 (18%)
501–1,00011,053 (6%)
1,001–5,00013,704 (8%)
5,001–10,0002,358 (1%)
10,001+2,265 (1%)
Share of companies with a recorded size, by employees.
No size recorded: 14K+
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Frequently asked questions
About the Microsoft Outlook data on this page.
How many companies use Microsoft Outlook?
Firmable holds confirmed Microsoft Outlook detections for 186,637 distinct companies, 73,154 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Microsoft Outlook?
Cresset, First Eagle Investment Management and Intellia Therapeutics, Inc. are among the most prominent in the current set.
What industries use Microsoft Outlook?
Professional and business services, industrial and manufacturing and construction and building lead the set, across 19 industries in total.
What size companies use Microsoft Outlook?
Adoption concentrates in the 51-250 employee band, across the companies whose size is recorded.
Where are Microsoft Outlook users based?
The United States, Canada, Australia and the Philippines account for most detections, across 13 countries.
How current is this data?
73,154 companies were confirmed in the last 90 days. Last detection 14 October 2026.
