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.

Back to Search

city.ac.uk

https://city.ac.uk· First analyzed 14 Feb 2026· Updated 14 Feb 2026

Export

city.ac.uk

Mobile

Sponsored

Hosting Provider

Squiz hosting

IP Address

43.245.41.211

Server Location

🇦🇺 Sydney, Australia

ASN

AS55532

Organization

Squiz hosting

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns01.city.ac.uk.ns02.city.ac.uk.ns3.ja.net.

Performance

Page Speed

7.1 MB

59 requests

Image Optimization

Responsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

Squiz hosting

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

11 Technologies Detected

Frameworks

React

Angular

Fonts

Adobe Fonts (Typekit)Adobe Fonts

Libraries

CSS Frameworks

Icon Libraries

Analytics

Tag Managers

Advertising

CDN

SEO Analysis

B72/100

city.ac.ukcity.ac.uk

City St George's, University of London

The University of business, practice and the professions.

Title Length38 chars

Recommended: 50-60 chars

Description Length57 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (43/70)

2 issues found

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Sponsored

Security Score

46%Poor

Interactive

HTTPS

WAF

71d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

26.01.2026

Valid Until

26.04.2026

Subject Alternative Names (1)

www.citystgeorges.ac.uk

SHA-256 Fingerprint

A7:E5:B7:39:5A:CB:A1:01:97:1E:FB:86:59:58:EA:16:2E:B4:4A:FD...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

age

alt-svc

h3=":443"; ma=86400

cache-control

🟡 0s(private, max-age=0)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9cdcb9f85ac7f415-FRA

content-encoding

⚡ Brotli(br)

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

city-ac-uk.mail.protection.outlook.com

Domain Information

city.ac.uk

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Legitimate interest basis mentioned

Typography & Readability

ff-meta-web-pro + Plex Sans

75/100

Readability

/30

32/40

15px · LH 1.60

Hierarchy

/20

25/25

3.34x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

ff-meta-web-pro

Sans50px

Body Font

Plex Sans

Sans15px

Contrast Ratio

Reading Comfort

~34 CPL

Needs attention

50px

35px

31px

15px

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.60 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.3x larger than body text.

✅ Protected text on images: Using gradient for readability.

⚠️ Cramped layout: 22 elements lack adequate spacing.

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

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

13 Resources

Scripts

Styles

Async

Defer

Top Script Sources

citystgeorges.ac.uk(8)consent.cookiebot.com(2)googletagmanager.com(1)

Website Identity

Facebook X (Twitter)Instagram TikTok Pinterest

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Last analyzed: 14 Feb 2026 at 12:57

Historical Analysis & Change Tracking