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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londonstockexchange.com

https://londonstockexchange.com· First analyzed 15 Feb 2026· Updated 15 Feb 2026

Export

Mobile

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

104.18.42.141

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Nginx

CDN

CloudFront

Nameservers

kayleigh.ns.cloudflare.com.piers.ns.cloudflare.com.

Performance

Page Speed

2.2 MB

50 requests

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Ghost

Technology Stack

6 Technologies Detected

Frameworks

CSS Frameworks

Other

Web Servers

SEO Analysis

D49/100

londonstockexchange.comlondonstockexchange.com

London Stock Exchange | London Stock Exchange

null

Title Length45 chars

Recommended: 50-60 chars

Description Length4 chars

Recommended: 120-160 chars

Issues (2)

• Missing H1 tag - every page should have one H1
• Many images missing alt text (2/2)

4 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

5 rules

Sitemap reference found

Sponsored

A+

Security Score

93%Excellent

Static / Informational

HTTPS

No WAF

254d

Certificate Details

Type

Extended Validation (EV)

Certificate Authority

COMODO CA Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

26.09.2025

Valid Until

27.10.2026

OCSP Stapling

Enabled

Subject Alternative Names (11)

www.londonstockexchange.comapi.londonstockexchange.comdmd.londonstockexchange.comdocs.londonstockexchange.comdr-be.londonstockexchange.comlondonstockexchange.comm.londonstockexchange.comprod-api.londonstockexchange.com+3 more

SHA-256 Fingerprint

CF:85:81:18:56:9B:70:5B:79:74:63:6D:76:4C:C3:CD:58:4D:FA:F1...

Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

content-encoding

📦 Gzip(gzip)

content-type

text/html; charset=utf-8

date

Sun, 15 Feb 2026 07:15:35 GMT

etag

W/"5fc6-mwn42P1KNVISj08oZiWxPBk4mNw"

referrer-policy

strict-origin-when-cross-origin

server

nginx

Good Warning Issue

Email Infrastructure

Mimecast

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

eu-smtp-inbound-1.mimecast.com

eu-smtp-inbound-2.mimecast.com

Domain Information

londonstockexchange.com

Domain Age

29y 4m

Created

16.10.1996

Expires

15.10.2026

Last Updated

13.09.2025

Registrar

MarkMonitor Inc.

DNSSEC

Not Enabled

Typography & Readability

Proxima Nova

58/100

Readability

/30

24/40

14px · LH 1.30

Hierarchy

/20

8/25

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Proxima Nova

Body Font

Proxima Nova

Sans14px

Contrast Ratio

Reading Comfort

~45 CPL

Optimal (45–75)

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

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

✅ Optimal line length: ~45 characters per line is comfortable to read.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Enterprise

CRM Systems

SalesforceEnterprise

Customer Relationship Management platforms

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)pi.pardot.com(1)tag.demandbase.com(1)

Website Identity

londonstockexchange.com

29 years old

MarkMonitor Inc.📧 Mimecast

Sponsored

Last analyzed: 15 Feb 2026 at 07:15

Historical Analysis & Change Tracking