A breakdown of the 14 companies running OpenSRS Hosted Email.
Top industries
Education and training2
Information technology and services2
Media and telecommunications2
Professional and business services2
Art, sports and recreation1
Government and public services1
Hospitality and travel1
Industrial and manufacturing1
No industry recorded: 2
Company size
1–102 (17%)
11–501 (8%)
51–2501 (8%)
251–5003 (25%)
501–1,0002 (17%)
1,001–5,0001 (8%)
5,001–10,0001 (8%)
10,001+1 (8%)
Share of companies with a recorded size, by employees.
No size recorded: 2
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Frequently asked questions
About the OpenSRS Hosted Email data on this page.
How many companies use OpenSRS Hosted Email?
Firmable holds confirmed OpenSRS Hosted Email detections for 14 distinct companies, 14 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use OpenSRS Hosted Email?
The Vacation Group, Princeton University and Realtor.com are among the most prominent in the current set.
What industries use OpenSRS Hosted Email?
Education and training, information technology and services and media and telecommunications lead the set, across 11 industries in total.
What size companies use OpenSRS Hosted Email?
Adoption concentrates in the 251-500 employee band, across the companies whose size is recorded.
Where are OpenSRS Hosted Email users based?
The United States, Australia, Canada and the Philippines account for most detections, across 13 countries.
How current is this data?
14 companies were confirmed in the last 90 days. Last detection 13 October 2026.
