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Shops & marketplaceswww.sainsburys.co.uk

Sainsbury's — website check

Chain of supermarkets in the United Kingdom, founded 1869, based in City of London. Sainsbury's’s website (www.sainsburys.co.uk) runs on React. It is delivered through Akamai. Email from the domain is protected by an enforced DMARC policy.

Logo: Sainsbury's · Public domain · Wikimedia Commons
73
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.

100
Security
60
Speed & delivery
75
Email & domain
55
SEO & markup
Official siteChecked 22 Oct 2026

About the brand

Founded1869
CountryUnited Kingdom
HeadquartersCity of London
IndustryRetail
Part ofJ Sainsbury
Official websitewww.sainsburys.co.uk
In our catalogue from Sainsbury'sArgosHabitat

Facts: Wikidata (CC0).

UK footprint

891
listed locations
62
regions
300
towns & cities

Listed as “Sainsbury's Local”. Also listed: Sainsbury's (647).

Store counts compiled from public map listings, October 2026. Listings are grouped by the name they carry; a company’s own store count can differ.

Built with

Tag managersTealium iQ
CDNAkamai
Web frameworksReact
Static site generatorsGatsby
Security & bot protectionAkamai Bot Manager
Monitoring & RUMNew Relic

Hosting & delivery

Network (AS)Akamai
HTTP versionHTTP/3
TLSTLS 1.3
CertificateSectigo Limited · valid until 2027-03-04
First response2,739 ms
Homepage weight928 KB
IPv6yes

Email & domain

Mail providerProofpoint
SPFyes
DMARC policyp=reject
BIMIyes
DNSSECno
CAAno
Verified servicesAdobe (Admin Console), Apple (domain verification), Atlassian Cloud, Amazon SES / AWS, Meta Business (domain verification), Google Search Console, Jamf, Microsoft 365

SEO & social

Title11 characters
Meta description148 characters
Canonicalyes
Structured datano
Language versions0
Open Graphno
Social profiles linkedFacebook, Instagram, Pinterest, 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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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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