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Energy, telecoms & utilitieswww.centrica.com

Centrica — website check

Business, enterprise and public company in United Kingdom, founded 1997, based in Windsor. Centrica’s website is www.centrica.com; we did not detect a known CMS or shop platform. It is delivered through Cloudflare. Email from the domain is protected by an enforced DMARC policy.

Logo: Unknown author · Public domain · Wikimedia Commons
70
Brand Web Indexout of 100

Share of 26 technical checks the site passes: security, speed, email and SEO. A measurement of the website — not a popularity ranking.

78
Security
40
Speed & delivery
63
Email & domain
82
SEO & markup
Official siteChecked 23 Oct 2026

About the brand

Founded1997
CountryUnited Kingdom
HeadquartersWindsor
IndustryEnergy supply
Official websitewww.centrica.com

Facts: Wikidata (CC0).

Built with

Cookie consent (CMP)OneTrust
Tag managersGoogle Tag Manager
CDNCloudflare
CSS frameworksBootstrap
JavaScript librarieslazysizes
Email marketingMailchimp
Hosting platformsAzure App Service
VideoVimeo

Hosting & delivery

Servercloudflare
Network (AS)Cloudflare
HTTP versionHTTP/3
TLSTLS 1.3
CertificateGoogle Trust Services · valid until 2027-01-06
First response2,900 ms
Homepage weight115 KB
IPv6no

Email & domain

Mail providerMicrosoft 365
SPFyes
DMARC policyp=reject
BIMIno
DNSSECno
CAAno
Verified servicesAdobe (Admin Console), Anthropic, Apple (domain verification), Atlassian Cloud, Amazon SES / AWS, Cisco Webex, DocuSign, Figma

SEO & social

Title15 characters
Meta description4 characters
Canonicalyes
Structured dataArticle
Language versions0
Open Graphyes
Social profiles linkedInstagram, Linkedin, Tiktok, X, Youtube

AI crawlers & robots

AI crawlers blockednone
llms.txtno
ads.txtno
security.txtno

Checklist

Security

  • HTTPS by default
  • HSTS header
  • TLS 1.3
  • Content-Security-Policy
  • X-Content-Type-Options
  • Referrer-Policy

Speed & delivery

  • HTTP/3
  • IPv6
  • First response under 1.5 s
  • Homepage under 1.5 MB

Email & domain

  • SPF record
  • DMARC record
  • DMARC enforced (quarantine / reject)
  • BIMI logo record
  • DNSSEC
  • CAA record

SEO & markup

  • Title tag 10–70 characters
  • Meta description
  • Canonical link
  • Exactly one H1
  • Structured data (JSON-LD)
  • Open Graph title and image
  • All images have alt text
  • XML sitemap
  • robots.txt
  • security.txt

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OVO Energy www.ovoenergy.com Contentful 784088100 82
Biffa www.biffa.co.uk Sitecore 100406391 79
DHL www.dhl.com Adobe Experience Manager 100407582 79
EE ee.co.uk Adobe Experience Manager 78408891 79
Plusnet www.plus.net Adobe Experience Manager 100807564 79

Data from our own crawler: homepage, DNS, TLS and robots.txt of each brand’s official website. coolbrands.uk.com is an independent catalogue. It is not affiliated with Superbrands (UK) Ltd or the CoolBrands® awards programme, and does not publish their results.

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