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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ordnancesurvey.co.uk

https://ordnancesurvey.co.uk· First analyzed 20 Feb 2026· Updated 20 Feb 2026

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Hosting Provider

F5 Distributed cloud services

IP Address

159.60.142.33

Server Location

🇫🇷 Suresnes, France

ASN

AS35280

Organization

F5 Distributed cloud services

Server

volt-adc

CDN

Varnish

Nameservers

ans2.cw.net.ans1.cw.net.

Performance

Page Speed

965 KB

28 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

F5 Distributed cloud services

CDN

Varnish

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

5 Technologies Detected

Analytics

Frameworks

CSS Frameworks

Tag Managers

SEO Analysis

B74/100

ordnancesurvey.co.ukordnancesurvey.co.uk

Ordnance Survey | Great Britain's national mapping service

Discover Ordnance Survey's trusted geospatial data and maps, and unlock location insight and intelligence.

Title Length58 chars

Recommended: 50-60 chars

Description Length106 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (13/13)

3 issues found

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Crawlability

Sitemap

Type: standard

1,409 URLs

robots.txt

11 rules

Sitemap reference found

Allows all crawlers

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Security Score

51%Poor

Interactive

HTTPS

No WAF

319d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

DigiCert Inc

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

06.01.2026

Valid Until

05.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.ordnancesurvey.co.ukordnancesurvey.co.uk

SHA-256 Fingerprint

50:ED:09:2B:6B:A5:68:D4:2F:FE:92:1C:6A:3F:1C:BD:47:92:D1:A8...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

access-control-allow-credentials

true

alt-svc

h3=":443";ma=60;

cache-control

🔴 No Cache(no-cache, no-store)

content-encoding

📦 Gzip(gzip)

content-length

48685

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (1)

ordnancesurvey.mail.protection.outlook.com

Domain Information

ordnancesurvey.co.uk

DNSSEC

Not Enabled

Privacy & Compliance

Civic Cookie Control

Cookie Consent Banner

Civic Cookie Control

GDPR Indicators

Cookie consent banner detected

CMP: Civic Cookie Control

Typography & Readability

Hanken Grotesk Variable

68/100

Readability

/30

32/40

30px · LH 1.30

Hierarchy

/20

13/25

1.6x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Hanken Grotesk Variable

Sans48px

Body Font

Hanken Grotesk Variable

Sans30px

Contrast Ratio

Reading Comfort

~38 CPL

Needs attention

48px

24px

20px

30px

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

✅ Good hierarchy: Clear distinction between headlines and body text.

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

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

✅ Smart font loading: Using font-display: swap prevents invisible text during load.

⚠️ Cramped layout: 10 elements lack adequate spacing.

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Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

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Scripts & Styles

12 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(5)ordnancesurvey.co.uk(3)googletagmanager.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube

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Last analyzed: 20 Feb 2026 at 00:35

Historical Analysis & Change Tracking