A breakdown of the 42K+ companies running Proton Mail.
Top industries
Information technology and services6.2K+
Professional and business services6.1K+
Health and wellness3.9K+
Art, sports and recreation2.6K+
Financial services1.8K+
Retail trade1.5K+
Construction and building1.5K+
Industrial and manufacturing1.4K+
No industry recorded: 9.3K+
Company size
1–1011,438 (67%)
11–503,653 (21%)
51–2501,416 (8%)
251–500256 (1%)
501–1,00083 (<1%)
1,001–5,000167 (1%)
5,001–10,00022 (<1%)
10,001+44 (<1%)
Share of companies with a recorded size, by employees.
No size recorded: 25K+
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Frequently asked questions
About the Proton Mail data on this page.
How many companies use Proton Mail?
Firmable holds confirmed Proton Mail detections for 42,165 distinct companies, 39,643 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Proton Mail?
Digital Promise, eSimplicity and Common Sense Media are among the most prominent in the current set.
What industries use Proton Mail?
Information technology and services, professional and business services and health and wellness lead the set, across 19 industries in total.
What size companies use Proton Mail?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are Proton Mail users based?
The United States, Canada, Australia and Singapore account for most detections, across 13 countries.
How current is this data?
39,643 companies were confirmed in the last 90 days. Last detection 13 October 2026.
