Technology answer

Lucene

181

companies run it, <0.01% of 54,527,857 in the index. Landing 12 Sept 2026.

Hosts: 486 live hosts run it, of 191,809,695 hosts in the index, <0.01%. A host is a website, not a company.

Companies by month

No published series

181 companies is under the publication floor of 1,000, and the fixed panel anchored at 31 Dec 2020 carries 64 of them. A monthly line drawn off that many observations would be noise at the same weight as a line off millions, so this page states the count and its date and publishes no series.

First discovered 4 Oct 2019, last discovered 10 Sept 2026.

Both denominators, and a third

Shares of the same 181each row a different wholelanding 12 Sept 2026

Denominator

Companies

Share

companies in the index

54,527,857

<0.01%

companies running anything in Databases and Data Engineering

26,047,109

<0.01%

companies running anything in Search platforms

19,904

0.91%

Three wholes, three shares of one count: a share travels with its whole, never alone. Against the last of them, Lucene is rank 4 of 10 technologies in Search platforms.

Open as a segment

181 companies; add a country, a sector or a band on the segment page. Counting is free.

/companies/tech-lucene

Open the segment

Catalogue record

As recorded in the cataloguetaxonomy release tax-2026.10last discovered 10 Sept 2026

Apache Lucene is a high-performance full‑text search library for Java.

Apache Lucene is an open-source library that provides indexing and full-text search capabilities for applications running on the JVM. It is maintained by the Apache Software Foundation and used by developers to build search features and engines.

Kindlibrary

VendorCAMEL, apache.org

PathData, Analytics and AI > Databases and Data Engineering > Search platforms

Sluglucene

Deploymentself-hosted

Pricingfree

Open sourceyes

First discovered2019-10-04

Last discovered2026-09-10

Taxonomy releasetax-2026.10

One click under this answer

Subcategory answerSearch platformsCompanies running anything in Search platforms, 19,904 of 54,527,857 in the index, and the technologies ranked in it.Category answerDatabases and Data EngineeringThe category above this one, with its subcategories and the companies in each.CatalogueAll 8,177 technologiesRanked by the companies running them, with the publication gate named and the long tail drawn.