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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pistonheads.com

https://pistonheads.com· First analyzed 20 Feb 2026· Updated 20 Feb 2026

Export

pistonheads.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

108.156.22.68

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Vercel

CDN

CloudFront

Nameservers

ns-481.awsdns-60.com.ns-716.awsdns-25.net.ns-1291.awsdns-33.org.ns-1590.awsdns-06.co.uk.

Performance

Page Speed

3.8 MB

197 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Hybrid

⚡ SSG

Frontend

Framework

Next.js

Infrastructure

Hosting

Amazon Web Services (AWS)

CDN

CloudFront

Progressive Web App

Web ManifestApple Touch IconTheme Color

Technology Stack

9 Technologies Detected

CSS Frameworks

Meta Frameworks

Icon Libraries

Fonts

Analytics

Tag Managers

Reviews

Platforms

SEO Analysis

C64/100

pistonheads.compistonheads.com

PistonHeads UK - Stop Dreaming Start Driving

Trusted by millions as the number one place to buy, sell and love premium, performance and collectible cars. PistonHeads: Stop dreaming, start driving.

Title Length44 chars

Recommended: 50-60 chars

Description Length151 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (92/94)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

robots.txt

71 rules

Sitemap reference found

Allows all crawlers

Sponsored

Security Score

89%Very Good

Interactive

HTTPS

No WAF

283d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Amazon

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

03.11.2025

Valid Until

30.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (2)

pistonheads.com*.pistonheads.com

SHA-256 Fingerprint

0B:B1:2F:E3:9F:93:AA:24:47:DA:39:94:B8:76:2F:B2:9F:56:18:E9...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

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HTTP Headers

Developer Console

age

cache-control

🟡 0s(public, max-age=0, must-revalidate)

content-encoding

📦 Gzip(gzip)

content-security-policy

upgrade-insecure-requests; block-all-mixed-content;

content-type

text/html; charset=utf-8

cross-origin-opener-policy

same-origin

Good Warning Issue

Email Infrastructure

Google Workspace

Score

100

SPF

DKIM

DMARC

DMARC Policy

Reject (Strictest)

MX Records (2)

alt1.aspmx.l.google.com

aspmx.l.google.com

Domain Information

pistonheads.com

Domain Age

26y 6m

Created

02.08.1999

Expires

02.08.2027

Last Updated

28.01.2025

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Carbon-Bold + Open Sans

79/100

Readability

/30

40/40

16px · LH 1.50

Hierarchy

/20

18/25

8x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

2 fonts

Heading Font

Carbon-Bold

Sans128px

Body Font

Open Sans

Sans16px

Contrast Ratio

Reading Comfort

~44 CPL

Needs attention

128px

96px

24px

16px

✅ Excellent readability: 16px body text is ideal for all devices.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 8.0x larger than body text.

✅ Good performance: Using 2 font families keeps load times fast.

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

✅ Protected text on images: Using gradient for readability.

Buy on MyFonts

Business & Marketing Stack

4 Tools Detected

Advanced

Behavior Analytics

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Reviews & Social Proof

TrustpilotMid-Market

Customer reviews and testimonials

Sponsored

Scripts & Styles

21 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(18)cmp.inmobi.com(1)gstatic.com(1)

Website Identity

Facebook X (Twitter)Instagram YouTube TikTok

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Last analyzed: 20 Feb 2026 at 07:35

Historical Analysis & Change Tracking