As of 14 October 2026, Firmable tracks 1,974 companies across 13 countries running Apache Spark master/worker web UI. See who they are, and who to call.
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A breakdown of the 1.9K+ companies running Apache Spark master/worker web UI.
Top industries
Information technology and services1K+
Professional and business services189
Construction and building82
Government and public services75
Education and training73
Financial services70
Health and wellness61
Art, sports and recreation58
No industry recorded: 42
Company size
1–10487 (33%)
11–50465 (31%)
51–250305 (21%)
251–500107 (7%)
501–1,00023 (2%)
1,001–5,00041 (3%)
5,001–10,00011 (1%)
10,001+40 (3%)
Share of companies with a recorded size, by employees.
No size recorded: 495
Versions detected
10 versions across the confirmed companies. Counts are distinct companies seen running that version.
3.5.36
3.3.44
3.5.04
3.4.43
3.5.43
2.4.52
3.1.12
3.2.02
3.2.22
3.3.22
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Frequently asked questions
About the Apache Spark master/worker web UI data on this page.
How many companies use Apache Spark master/worker web UI?
Firmable holds confirmed Apache Spark master/worker web UI detections for 1,974 distinct companies, 908 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Apache Spark master/worker web UI?
Alluxio, OpsWerks and Lemma are among the most prominent in the current set.
What industries use Apache Spark master/worker web UI?
Information technology and services, professional and business services and construction and building lead the set, across 19 industries in total.
What size companies use Apache Spark master/worker web UI?
Adoption concentrates in the 1-10 employee band, across the companies whose size is recorded.
Where are Apache Spark master/worker web UI users based?
The United States, Australia, Canada and Singapore account for most detections, across 13 countries.
How current is this data?
908 companies were confirmed in the last 90 days. Last detection 14 October 2026.
