Business & industrywww.gsk.com
GSK — website check
British multinational pharmaceutical and biotechnology company, founded 2000, based in London. GSK’s website (www.gsk.com) runs on Umbraco. Email from the domain is protected by an enforced DMARC policy.
82
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
63
Email & domain
91
SEO & markup
Official siteChecked 22 Oct 2026
About the brand
Founded2000
CountryUnited Kingdom
HeadquartersLondon
IndustryPharmaceutical industry · Biotechnology
Official websitewww.gsk.com
Facts: Wikidata (CC0).
Built with
Hosting & delivery
Network (AS)Akamai
HTTP versionHTTP/3
TLSTLS 1.3
CertificateLet's Encrypt · valid until 2026-11-30
First response2,571 ms
Homepage weight416 KB
IPv6yes
Email & domain
Mail providerProofpoint
SPFyes
DMARC policyp=reject
BIMIno
DNSSECno
CAAno
Verified servicesAdobe (Admin Console), Anthropic, Apple (domain verification), Atlassian Cloud, Amazon SES / AWS, Box, Cisco Webex, Meta Business (domain verification)
SEO & social
Title10 characters
Meta description80 characters
Canonicalyes
Structured dataCorporation, PostalAddress, SearchAction
Language versions0
Open Graphyes
Social profiles linkedBluesky, Facebook, Instagram, Linkedin, X, Youtube
AI crawlers & robots
AI crawlers blockednone
llms.txtno
ads.txtno
security.txtyes
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
More business & industry brands All
| Brand | Website | Platform | Security | Speed & delivery | Email & domain | SEO & markup | Index |
|---|---|---|---|---|---|---|---|
| Slaughter and May | www.slaughterandmay.com | — | 100 | 80 | 88 | 82 | 88 |
| Croda International | www.croda.com | Sitecore | 100 | 40 | 75 | 91 | 82 |
| GXO | gxo.com | Rank Math | 100 | 40 | 75 | 91 | 82 |
| Hays | www.hays.com | Liferay | 89 | 60 | 75 | 91 | 82 |
| MITIE Group | www.mitie.com | WordPress | 100 | 80 | 63 | 82 | 82 |
| PricewaterhouseCoopers | www.pwc.com | Adobe Experience Manager | 89 | 40 | 88 | 91 | 82 |
| Accenture | www.accenture.com | Adobe Experience Manager | 100 | 40 | 75 | 82 | 79 |
| Allen & Overy | www.aoshearman.com | Sitecore | 100 | 40 | 75 | 82 | 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.
Want your brand’s website benchmarked?
We compare your site with your category on security, speed, email and SEO — and fix what lags behind.