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Polyfill.io (compromised CDN) usage in the UK

Polyfill.io (compromised CDN) runs on 0.2% of UK websites in our sample (18 of 11,909). Market share by country, top sites using it and technologies it is…

0.2%
Share in United Kingdom
18 / 11,909
0
sites in Tranco top 1K
1 in top 10K
#424,399
median Tranco rank
Tranco
<0.1%
Among local business websites
8 / 21,114
11
frequent companions
Google Marketing Platform (DV360/CM360)

By market

  1. United Kingdom0.2%18
  2. Global<0.1%32
  3. Netherlands0.1%11
  4. Italy<0.1%4
  5. Spain<0.1%2
  6. Japan<0.1%10
  7. Latin America<0.1%15

Trend

Often used with

  1. Google Marketing Platform (DV360/CM360)Advertising & pixels44%×9.1
  2. Google Publisher Tag (Ad Manager)Advertising & pixels44%×11.9
  3. ComscoreAnalytics39%×33.1
  4. SentryMonitoring & RUM39%×38.6
  5. VarnishWeb servers28%×5.2
  6. Google Tag ManagerTag managers28%
  7. Google FontsWeb fonts28%
  8. BootstrapCSS frameworks28%
  9. Civic Cookie ControlCookie consent (CMP)22%×8.3
  10. cdnjsCDN17%

Top sites using Polyfill.io (compromised CDN)

TrancoSiteAlso usesHosting
2,476guardian.co.ukComscoreGoogle Marketing Platform (DV360/CM360)Google Publisher Tag (Ad Manager)SentryFastly
115,157cambridgeshire.gov.ukMicrosoft ClarityCivic Cookie ControlGoogle FontsPlausibleVarnishVimeoZengenti
149,868homify.co.ukBunny CDNcdnjsGoogle Marketing Platform (DV360/CM360)Google Publisher Tag (Ad Manager)Google Tag ManagerjQuery 2.2.4Amazon Web Services
158,353cheshirewestandchester.gov.ukCivic Cookie ControlGoogle Tag ManagerReciteMeSwiperVarnishZengenti
200,517uhs.nhs.ukVarnishZengenti
239,462stevenage.gov.ukcdnjsMicrosoft ClarityCivic Cookie ControlGoogle FontsGoogle Tag ManagerSlickZengenti
310,407krispykreme.co.ukAdobe FontsBootstrapcdnjsGoogle MapsGoogle Tag ManagerHotjarCloudflare
311,100chatgpt.org.ukGoogle AdSenseBloggerBootstrap 5.1.3Google Funding ChoicesGoogle FontsjsDelivrGoogle Cloud
414,495pearsonschoolsandfecolleges.co.ukAkamai Bot ManagerAkamaiOneTrustVarnishVWOAmazon Web Services
434,304haart.co.ukAdobe FontsBootstrap 3.3.7Civic Cookie ControlFont AwesomeGoogle FontsGoogle Tag ManagerMicrosoft Azure
511,913barb.co.ukBootstrapcore-jsFont AwesomeGoogle Analytics 4Google FontsGutenberg blocksAmazon Web Services
597,581guardianunlimited.co.ukComscoreGoogle Marketing Platform (DV360/CM360)Google Publisher Tag (Ad Manager)SentryAmazon Web Services
673,245booksunlimited.co.ukComscoreGoogle Marketing Platform (DV360/CM360)Google Publisher Tag (Ad Manager)SentryAmazon Web Services
678,227ashes.co.ukComscoreGoogle Marketing Platform (DV360/CM360)Google Publisher Tag (Ad Manager)SentryAmazon Web Services
691,361cipdawards.co.ukComscoreGoogle Marketing Platform (DV360/CM360)Google Publisher Tag (Ad Manager)SentryAmazon Web Services
695,024cipd-awards.co.ukComscoreGoogle Marketing Platform (DV360/CM360)Google Publisher Tag (Ad Manager)SentryAmazon Web Services
717,809commentisfree.co.ukComscoreGoogle Marketing Platform (DV360/CM360)Google Publisher Tag (Ad Manager)SentryAmazon Web Services
909,920connectec.ukBootstrapCloudflareGoogle Analytics 4SwiperCloudflare

Our crawler: 11,909 sites · United Kingdom · updated 23 Oct 2026 · Methodology

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