A breakdown of the 1.6K+ companies running SmtpJS.
Top industries
Information technology and services334
Professional and business services198
Transport122
Construction and building92
Financial services85
Industrial and manufacturing82
Education and training65
Art, sports and recreation61
No industry recorded: 237
Company size
1–10411 (45%)
11–50265 (29%)
51–250154 (17%)
251–50058 (6%)
501–1,0006 (1%)
1,001–5,00015 (2%)
5,001–10,0005 (1%)
10,001+9 (1%)
Share of companies with a recorded size, by employees.
No size recorded: 679
Versions detected
1 versions across the confirmed companies. Counts are distinct companies seen running that version.
337
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Frequently asked questions
About the SmtpJS data on this page.
How many companies use SmtpJS?
Firmable holds confirmed SmtpJS detections for 1,602 distinct companies, 753 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use SmtpJS?
Xpertdox, TO Live and Vinton Steel, LLC are among the most prominent in the current set.
What industries use SmtpJS?
Information technology and services, professional and business services and transport lead the set, across 19 industries in total.
What size companies use SmtpJS?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are SmtpJS users based?
The United States, Australia, Canada and Indonesia account for most detections, across 13 countries.
How current is this data?
753 companies were confirmed in the last 90 days. Last detection 14 October 2026.
