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

essex.ac.uk

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

Export

essex.ac.uk

Mobile

Sponsored

Hosting Provider

Microsoft Azure

azure.microsoft.com

IP Address

20.90.134.18

Server Location

🇬🇧 City of London, United Kingdom

ASN

AS8075

Organization

Microsoft Azure App Service (uksouth)

Server

Microsoft IIS

Nameservers

ns3.ja.net.ns0.essex.ac.uk.ns1.essex.ac.uk.ns2.essex.ac.uk.

Performance

Page Speed

1.6 MB

107 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Microsoft Azure

Progressive Web App

Web ManifestApple Touch IconTheme Color

Detected API Sources

https://eu.gw.fortiabp.forticl...

Technology Stack

13 Technologies Detected

Advertising

Google Ads Google AdSense Twitter Ads LinkedIn Ads TikTok Pixel Snapchat Pixel

Analytics

CSS Frameworks

Icon Libraries

Tag Managers

Web Servers

SEO Analysis

C61/100

essex.ac.ukessex.ac.uk

UoE | University of Essex

At Essex we're a bunch of risk-takers and opinion-makers, stereotype-breakers and world-shakers. Study at our Colchester Campus, Southend Campus, Loughton Ca...

Description truncated.

Title Length25 chars

Recommended: 50-60 chars

Description Length168 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (18/20)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

2 URLs

robots.txt

61 rules

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

33d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/1.1

Valid From

19.12.2025

Valid Until

19.03.2026

Subject Alternative Names (1)

www.essex.ac.uk

SHA-256 Fingerprint

E7:F0:AA:12:E9:8C:A4:CC:89:02:DF:9F:CE:F8:B0:81:43:EF:3C:D5...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

access-control-allow-origin

https://*.essex.ac.uk

cache-control

🔴 No Cache(no-cache, no-store)

content-encoding

📦 Gzip(gzip)

content-length

24856

content-type

text/html; charset=utf-8

date

Sat, 14 Feb 2026 07:04:14 GMT

Good Warning Issue

Email Infrastructure

Barracuda

Score

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

d213859.a.ess.uk.barracudanetworks.com

d213859.b.ess.uk.barracudanetworks.com

Domain Information

essex.ac.uk

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

archivo

43/100

Readability

/30

32/40

18px · LH 1.25

Hierarchy

/20

8/25

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

archivo

Sans

Body Font

archivo

Sans18px

Contrast Ratio

Reading Comfort

Single Font Family

left aligned

140px

18px

✅ Excellent readability: 18px body text is ideal for all devices.

✅ Good performance: Using 1 font families keeps load times fast.

✅ Consistent design: Single font family with weight variations is a modern best practice.

⚠️ Risky: Text appears on background images without overlay protection.

Buy on MyFonts

Business & Marketing Stack

9 Tools Detected

Enterprise

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

Twitter/X AdsMid-Market

LinkedIn AdsEnterprise

TikTok PixelMid-Market

Snapchat PixelMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Social Media

Twitter/X WidgetsFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

22 Resources

Scripts

Styles

Async

Defer

Top Script Sources

connect.facebook.net(5)googletagmanager.com(5)analytics.tiktok.com(3)tr.snapchat.com(1)gstatic.com(1)

Website Identity

essex.ac.uk

📧 Barracuda

Social Profiles

Facebook X (Twitter)Instagram YouTube TikTok

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Last analyzed: 14 Feb 2026 at 07:04

Historical Analysis & Change Tracking