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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fasthosts.co.uk

https://fasthosts.co.uk· First analyzed 13 Feb 2026· Updated 13 Feb 2026

Export

fasthosts.co.uk

Mobile

Sponsored

Hosting Provider

Fasthosts

fasthosts.co.uk

IP Address

213.171.195.48

Server Location

🇬🇧 London, United Kingdom

ASN

AS8560

Organization

Fasthosts Internet Limited

Server

Apache

Nameservers

ns-fh.ui-dns.com.ns-fh.ui-dns.co.uk.ns-fh.ui-dns.biz.ns-fh.ui-dns.org.

Performance

Page Speed

727 KB

90 requests

Image Optimization

Lazy LoadWebPResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Ghost

Technology Stack

11 Technologies Detected

Analytics

Meta Frameworks

Libraries

Other

Other

CSS Frameworks

Tag Managers

Marketing

Reviews

Web Servers

SEO Analysis

C64/100

fasthosts.co.ukfasthosts.co.uk

Fasthosts | Domains, Servers, Websites and Email made simple | Fast...

From servers and cloud to domains and websites, Fasthosts has you covered. Get fast, reliable and flexible hosting with 24/7 support from real people.

Title truncated.

Title Length72 chars

Recommended: 50-60 chars

Description Length150 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (77/85)

4 issues found

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Crawlability

Sitemap

Type: standard

507 URLs

robots.txt

96 rules

Sitemap reference found

Sponsored

Security Score

36%Critical

Interactive

HTTPS

No WAF

113d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (4096 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/2

Valid From

06.05.2025

Valid Until

06.06.2026

OCSP Stapling

Enabled

Subject Alternative Names (13)

www.fasthosts.co.ukcareers.fasthosts.co.ukfasthosts.co.ukfasthosts.comfasthosts.infofasthosts.uklivemail.co.ukresellersupport.fasthosts.co.uk+5 more

SHA-256 Fingerprint

D6:E2:41:3D:6C:2F:77:AB:4C:67:BB:A7:17:76:79:38:60:4E:12:5C...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

accept-ranges

bytes

cache-control

🔴 No Cache(max-age=0, no-cache, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-language

content-length

19475

content-type

text/html; charset=UTF-8

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mxint01.1and1.com

mxint02.1and1.com

Domain Information

fasthosts.co.uk

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

AntennaCond-Bold + AntennaCond-Light

53/100

Readability

/30

40/40

20px · LH 1.70

Hierarchy

/20

18/25

2.15x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

10/20

4 fonts

Heading Font

AntennaCond-Bold

Sans43px

Body Font

AntennaCond-Light

Sans20px

Contrast Ratio

Reading Comfort

~107 CPL

Needs attention

43px

18px

35px

20px

Minor Third

Scale

✅ Excellent readability: 20px body text is ideal for all devices.

✅ Optimal line spacing: 1.70 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.1x larger than body text.

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

⚠️ Wide lines: ~107 chars/line. Consider max-width for better reading flow.

⚠️ Cramped layout: 51 elements lack adequate spacing.

Buy on MyFonts

Business & Marketing Stack

5 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

frontend-services.ionos.com(6)googletagmanager.com(5)local(3)js-eu1.hs-banner.com(1)js-eu1.hubspot.com(1)

Website Identity

Facebook X (Twitter)Instagram LinkedIn YouTube

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Last analyzed: 13 Feb 2026 at 09:59

Historical Analysis & Change Tracking