A/B testing

Optimizely usage in the UK

Optimizely runs on 0.5% of UK websites in our sample (54 of 11,909). Market share by country, top sites using it and technologies it is paired with.

0.5%

Share in United Kingdom

54 / 11,909

sites in Tranco top 1K

0 in top 10K

#248,681

median Tranco rank

Tranco

<0.1%

Among local business websites

8 / 21,114

frequent companions

Google Tag Manager

By market

United Kingdom0.5%54
Global0.6%436
Netherlands0.3%24
Italy0.2%15
Spain0.4%16
Japan0.1%13
Latin America<0.1%20

Trend

Often used with

Google Tag ManagerTag managers85%×2
BootstrapCSS frameworks39%
OneTrustCookie consent (CMP)37%×6.7
ReactWeb frameworks35%×5.2
CloudflareCDN35%
Next.jsWeb frameworks31%×6.3
jQueryJavaScript libraries31%
ASP.NETWeb frameworks24%×3.4
Tailwind CSSCSS frameworks22%×2.1
TrustpilotReviews17%×1.9

Top sites using Optimizely All 54 sites

Tranco	Site	Also uses	Hosting
12,656	rhs.org.uk	ASP.NETBootstrapCloudflareCloudflare Bot ManagementCloudflare Web AnalyticsGoogle Tag Manager	Cloudflare
13,917	virginmediao2.co.uk	Google Cloud CDN / GFEGoogle Tag ManagerNext.jsReactSpeedCurve LUXStoryblok	Google Cloud
19,541	o2.co.uk	Azure Front Door / CDNGoogle Cloud CDN / GFEGoogle Tag ManagerNext.jsReactSpeedCurve LUX	Microsoft Azure
22,068	featurespace.co.uk	Adobe Experience ManagerCloudflareCloudflare Bot ManagementEnvoyGoogle Tag ManagerNext.js	Amazon Web Services
24,778	ageuk.org.uk	ASP.NETAzure App ServiceCloudflareGoogle Tag ManagerModernizr	Episerver As
24,963	nspcc.org.uk	Alpine.jsASP.NETCloudflareCloudflare Bot ManagementGoogle FontsGoogle Tag Manager	Cloudflare
49,823	game.co.uk	Akamai Bot ManagerAkamaiAlgoliaBootstrapGoogle Tag ManagerjQuery	Akamai
57,961	studio.co.uk	Akamai Bot ManagerAkamaiBootstrapGoogle Tag ManagerNext.jsOneTrust	Akamai
62,306	ii.co.uk	Amazon CloudFrontGoogle Tag ManagerNext.jsOneTrustReact	Amazon Web Services
65,356	architectsjournal.co.uk	Adobe Experience Platform TagsGoogle AdSensecore-jsGoogle Marketing Platform (DV360/CM360)Font AwesomeGoogle Fonts	Amazon Web Services
70,750	furniturevillage.co.uk	BazaarvoiceBootstrapCloudflareCloudflare Web AnalyticsGoogle Marketing Platform (DV360/CM360)Google Tag Manager	Amazon Web Services
76,995	ajbell.co.uk	BootstrapAmazon CloudFrontDrupalEnvoyFont AwesomeGoogle Tag Manager	Amazon Web Services
94,470	talktalk.co.uk	Angular 16.2.12ContentfulEnvoyfluctGoogle Tag ManagerjsDelivr	F5
106,548	thejockeyclub.co.uk	ASP.NETAzure App ServiceBootstrapCloudflareGoogle Tag ManagerjsDelivr	Episerver As
119,290	alpinetrek.co.uk	CloudflareCloudflare Bot ManagementGoogle Cloud CDN / GFEGoogle Tag ManagerNew RelicOneTrust	Cloudflare
119,454	purplebricks.co.uk	Azure Front Door / CDNContentfulCookiebot (Usercentrics)Google Tag ManagerNext.jsReact	Microsoft Azure
122,236	axa.co.uk	ASP.NETCloudflareCloudflare Web AnalyticsGoogle Tag ManagerjQuery 3.5.1Swiper	Episerver As
130,867	tapi.co.uk	BootstrapCloudflareCookiebot (Usercentrics)Font AwesomeGoogle Tag Managerimpact.com	Cloudflare
163,914	ramsayhealth.co.uk	Adobe FontsASP.NETAzure App ServiceBootstrapCloudflareGoogle Tag Manager	Episerver As
177,013	bestwaywholesale.co.uk	cdnjsMicrosoft ClarityCivic Cookie ControlGoogle Tag ManagerHotjarjQuery 3.7.1	Ukfast
189,556	hiscox.co.uk	AcquiaBootstrapCloudflareCloudflare Bot ManagementCloudflare Web AnalyticsGoogle Marketing Platform (DV360/CM360)	Amazon Web Services
200,663	barratthomes.co.uk	ASP.NETBootstrapGoogle Tag ManagerImperva (Incapsula)OneTrustGoogle reCAPTCHA	Imperva
209,228	axahealth.co.uk	Azure App ServiceCloudflareCrownpeak (Evidon)Google Tag ManagerjQuery	Episerver As
226,057	claridges.co.uk	Azure Front Door / CDNNext.jsOneTrustReactTailwind CSS	Episerver As
229,256	nfumutual.co.uk	Azure App ServiceBootstrapCloudflareGoogle Tag ManagerjQueryOneTrust	Episerver As

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

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