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Technology answer

core-js

14,856,659

companies run it, 27.2% of 54,527,857 in the index. Landing 12 Sept 2026.

Hosts: 38,863,474 live hosts run it, of 191,809,695 hosts in the index, 20.3%. A host is a website, not a company.

Companies by month

Companies, monthly, on the fixed panel of sites crawled since 2020of 54,527,857 in the indexlanding 12 Sept 2026

14,856,464 at Sept 26; 16,356,961 twelve months earlier, -1,500,497, -9.2% on the fixed panel; the series starts January 2021 because the panel is anchored at 31 Dec 2020

The 69 numbers in this chart
MonthCompaniesObserved on the panel
2021-0100
2021-0200
2021-0300
2021-0400
2021-0500
2021-0600
2021-0700
2021-0800
2021-0900
2021-1000
2021-1100
2021-1200
2022-0100
2022-0200
2022-0300
2022-0400
2022-0500
2022-0600
2022-0700
2022-0800
2022-0900
2022-1000
2022-1100
2022-1200
2023-0100
2023-0200
2023-0300
2023-04730,847108,556
2023-051,342,198199,362
2023-061,953,549290,169
2023-072,564,901380,976
2023-083,176,252471,782
2023-093,787,603562,589
2023-104,398,954653,396
2023-115,010,305744,202
2023-125,621,656835,009
2024-016,233,008925,815
2024-026,844,6781,016,669
2024-037,744,4651,150,319
2024-048,617,4911,279,993
2024-058,759,6691,301,111
2024-069,024,9471,340,514
2024-079,289,8301,379,858
2024-089,569,2361,421,360
2024-0910,050,1641,492,794
2024-1010,658,2381,583,114
2024-1111,308,7731,679,741
2024-1211,943,4931,774,018
2025-0112,662,7081,880,846
2025-0213,342,0131,981,747
2025-0314,020,9992,082,599
2025-0414,439,0752,144,698
2025-0514,845,4792,205,063
2025-0615,289,4752,271,011
2025-0715,712,5352,333,850
2025-0816,133,6782,396,405
2025-0916,356,9612,429,570
2025-1016,377,5962,432,635
2025-1116,271,0852,416,814
2025-1216,122,1132,394,687
2026-0115,992,1722,375,386
2026-0215,863,5222,356,277
2026-0315,801,6712,347,090
2026-0415,720,2662,334,999
2026-0515,591,9062,315,933
2026-0615,487,8392,300,475
2026-0715,306,3442,273,517
2026-0815,107,6442,244,003
2026-0914,856,4642,206,694

Both denominators, and a third

Shares of the same 14,856,659each row a different wholelanding 12 Sept 2026

Denominator
Companies
Share
companies in the index
54,527,857
27.2%
companies running anything in JavaScript Libraries
40,118,208
37.0%
companies running anything in Polyfills and loaders
16,428,598
90.4%

Three wholes, three shares of one count: a share travels with its whole, never alone. Against the last of them, core-js is rank 1 of 14 technologies in Polyfills and loaders.

Open as a segment

14,856,659 companies; add a country, a sector or a band on the segment page. Counting is free.

/companies/tech-core-js

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Catalogue record

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

A JavaScript standard library with polyfills for ECMAScript features.

core-js is an open-source library that provides polyfills for modern ECMAScript and web standards so code can run in older environments. Developers include it in web apps to ensure compatibility across browsers.

Kindlibrary
Vendorcore-js project
Slugcore-js
Deploymentself-hosted
Pricingfree
Open sourceyes
First discovered2023-10-05
Last discovered2026-09-10
Taxonomy releasetax-2026.10