What does StackOptic analyze?

StackOptic runs 18 analysis modules on any public website from a single URL. It detects 7,000+ technologies (CMS, frameworks, analytics, payments, CDN, hosting), evaluates SSL certificates and HTTP security headers with grades from A+ to F, measures Core Web Vitals (LCP, CLS, TBT, FCP), audits SEO meta tags and structured data, checks email security (SPF, DKIM, DMARC), analyzes AI & LLM readiness including bot access and llms.txt validation, extracts color palettes and typography, estimates carbon footprint, and generates permanent shareable reports.

Does it work on sites behind Cloudflare or bot protection?

Yes. StackOptic uses a real browser engine that loads pages exactly like a human visitor — executing JavaScript, rendering CSS, and handling redirects. This allows it to bypass Cloudflare, LiteSpeed, Sucuri, and other bot protection systems where traditional crawlers and HTTP-only tools fail.

What do I get on the free plan?

The free plan includes 5 analyses per day with access to all 18 modules, full scores, technology detection, and security grades. Every report is permanently accessible via a unique shareable URL — no login required to view. No credit card needed. AI-powered insights, re-analysis, PDF/JSON export, and comparison features are available on Pro ($24/mo) and Agency ($99/mo) plans.

What is AI & LLM readiness analysis?

This module evaluates how visible and citable your website is to AI search engines like ChatGPT, Perplexity, Google AI Overviews, and Claude. It audits access permissions for 8 major AI bots, validates llms.txt and llms-full.txt files, scores citation-ready content structure, and analyzes structured data (JSON-LD) for GEO readiness — helping you rank in the next generation of search.

How long does an analysis take?

Most analyses complete in under 10 seconds. StackOptic runs all 18 modules in parallel using a real browser session, so you get technology detection, security audit, performance metrics, SEO analysis, and AI readiness scoring simultaneously.

How accurate are the results?

Detection is based on real browser execution — DOM inspection, JavaScript runtime analysis, HTTP headers, and DNS records. With 7,000+ technology signatures and Lighthouse-calibrated performance scoring, StackOptic achieves high accuracy for mainstream technologies.

What security checks are performed?

The security module evaluates SSL/TLS certificates, 12+ HTTP security headers (HSTS, CSP, X-Frame-Options, Permissions-Policy, Referrer-Policy), HTTPS enforcement, and email authentication (SPF, DKIM, DMARC). Each site receives a letter grade from A+ to F with specific remediation steps.

Do you store the websites I analyze?

StackOptic only stores publicly available information that any visitor to a website would see — HTML content, HTTP headers, DNS records, and screenshots. We do not access private data, log in to websites, or perform any intrusive testing.

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diageo.com

https://diageo.com· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

diageo.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

52.17.142.199

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS EC2 (eu-west-1)

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

udns2.cscdns.uk.udns1.cscdns.net.

Performance

Page Speed

2.1 MB

201 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

Frontend

Styling

Tailwind CSS

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

Cloudflare

Detected API Sources

https://player.vimeo.com/api/p...

Technology Stack

18 Technologies Detected

Libraries

jQuery

Lodash Moment.js Axios

Fonts

Google Fonts Adobe Fonts (Typekit)Adobe Fonts

Frameworks

Other

CSS Frameworks

Other

UI Components

Analytics

Tag Managers

CDN

SEO Analysis

A84/100

diageo.comdiageo.com

Discover Diageo | Diageo

With over 200 brands sold in nearly 180 countries, Diageo is driven to be the world’s best brand builder, leading the way in premium drinks.

Title Length24 chars

Recommended: 50-60 chars

Description Length140 chars

Recommended: 120-160 chars

Issues (0)

2 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

1,543 URLs

robots.txt

49 rules

Sitemap reference found

Sponsored

A+

Security Score

91%Excellent

Interactive

HTTPS

WAF

128d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Corporation Service Company

Key Algorithm

RSA (2048 bit)

Signature

SHA-384 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

29.05.2025

Valid Until

28.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

www.diageo.comdiageo.com

SHA-256 Fingerprint

F6:47:AC:71:B5:6D:A2:C5:85:1E:83:A0:C3:43:12:66:4A:87:30:C7...

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

*.diageohorizon.com

cache-control

🟣 Private(private)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9d0a76f56e9b9a1b-FRA

content-encoding

📦 Gzip(gzip)

content-security-policy

default-src *.myidx.cloud 'self' staticcontents.investis.com...

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

diageo-com.mail.protection.outlook.com

Domain Information

diageo.com

Domain Age

28y 4m

Created

30.09.1997

Expires

29.09.2026

Last Updated

25.09.2025

Registrar

CSC Corporate Domains, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

URWGeometricSemiBold + URWGeometricMedium

70/100

Readability

/30

32/40

30px · LH 1.20

Hierarchy

/20

18/25

2x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

URWGeometricSemiBold

Sans60px

Body Font

URWGeometricMedium

Sans30px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

60px

30px

✅ Excellent readability: 30px body text is ideal for all devices.

✅ Strong hierarchy: Headlines are 2.0x larger than body text.

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 21 elements lack adequate spacing.

✅ Clean layout: Consistent left alignment throughout.

AAdobe Fonts Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.jsdelivr.net(7)local(4)googletagmanager.com(2)cdn-ukwest.onetrust.com(2)cdnjs.cloudflare.com(2)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube

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Last analyzed: 20 Feb 2026 at 02:10

Historical Analysis & Change Tracking