A breakdown of the 2.7K+ companies running Apache Lucene.
Top industries
Information technology and services1.1K+
Professional and business services383
Financial services173
Government and public services145
Industrial and manufacturing138
Education and training113
Media and telecommunications105
Art, sports and recreation79
No industry recorded: 126
Company size
1–10207 (8%)
11–50358 (15%)
51–250562 (23%)
251–500265 (11%)
501–1,000192 (8%)
1,001–5,000381 (16%)
5,001–10,000144 (6%)
10,001+328 (13%)
Share of companies with a recorded size, by employees.
No size recorded: 272
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Frequently asked questions
About the Apache Lucene data on this page.
How many companies use Apache Lucene?
Firmable holds confirmed Apache Lucene detections for 2,709 distinct companies, 513 of them confirmed in the last 90 days. A company is counted once however many of its properties run it.
Which companies use Apache Lucene?
Butterfly Network, Inc., Heidi and Veritas Capital are among the most prominent in the current set.
What industries use Apache Lucene?
Information technology and services, professional and business services and financial services lead the set, across 19 industries in total.
What size companies use Apache Lucene?
Adoption concentrates in the 51-250 employee band, across the companies whose size is recorded.
Where are Apache Lucene users based?
The United States, Canada, Australia and Indonesia account for most detections, across 13 countries.
How current is this data?
513 companies were confirmed in the last 90 days. Last detection 14 October 2026.
