Business & industrywww.aon.com
Aon — website check
British multinational corporation, founded 1982, based in London. Aon’s website (www.aon.com) runs on Sitecore. It is delivered through Cloudflare. Email from the domain is protected by an enforced DMARC policy.
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.
89
Security
40
Speed & delivery
75
Email & domain
64
SEO & markup
Official siteChecked 22 Oct 2026
About the brand
Founded1982
CountryUnited Kingdom
HeadquartersLondon
IndustryProfessional service
Official websitewww.aon.com
Facts: Wikidata (CC0).
Built with
CMSSitecore
Cookie consent (CMP)OneTrust
Tag managersGoogle Tag Manager
CDNCloudflare
JavaScript librarieswebpack
Marketing automation & CRMOracle Eloqua
Security & bot protectionCloudflare Bot Management
CAPTCHAGoogle reCAPTCHA
Monitoring & RUMNew Relic
Hosting & delivery
Servercloudflare
Network (AS)Cloudflare
HTTP versionHTTP/3
TLSTLS 1.3
CertificateDigiCert Inc · valid until 2027-03-20
First response15,575 ms
Homepage weight374 KB
IPv6no
Email & domain
Mail providerMicrosoft 365
SPFyes
DMARC policyp=reject
BIMIyes
DNSSECno
CAAno
Verified servicesAnthropic, Apple (domain verification), Atlassian Cloud, Amazon SES / AWS, Cisco Webex, DocuSign, Meta Business (domain verification), Figma
SEO & social
Title22 characters
Meta description43 characters
Canonicalno
Structured datano
Language versions0
Open Graphyes
Social profiles linkedFacebook, Linkedin, X
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
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|---|---|---|---|---|---|---|---|
| Slaughter and May | www.slaughterandmay.com | — | 100 | 80 | 88 | 82 | 88 |
| Croda International | www.croda.com | Sitecore | 100 | 40 | 75 | 91 | 82 |
| GSK | www.gsk.com | Umbraco | 100 | 60 | 63 | 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 |
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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