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

gumtree.com

https://gumtree.com· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

gumtree.com

Sponsored

Hosting Provider

Google Cloud Platform

cloud.google.com

IP Address

34.111.18.115

Server Location

🇺🇸 Kansas City, United States

ASN

AS396982

Organization

Google Cloud

Server

Nginx

Nameservers

ns-cloud-e1.googledomains.com.ns-cloud-e4.googledomains.com.ns-cloud-e3.googledomains.com.ns-cloud-e2.googledomains.com.

Performance

Page Speed

5.6 MB

64 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Headless

⚙️ SSR

Decoupled

API

Data Source

Headless CMS

Strapi

Infrastructure

Hosting

Google Cloud Platform

Detected API Sources

https://functions.adnami.io/ap...

Technology Stack

12 Technologies Detected

Analytics

Google Analytics

Google Analytics 4

Microsoft Clarity Sentry

CSS Frameworks

Fonts

Tag Managers

Advertising

Payments

Web Servers

Frameworks

Plugins

SEO Analysis

B78/100

gumtree.comgumtree.com

Gumtree | Free classified ads from the #1 classifieds site in the UK

Discover the UK's leading marketplace for local buying and selling. Find amazing deals on cars, properties, and jobs, or sell your items quickly with Gum...

Description truncated.

Title Length68 chars

Recommended: 50-60 chars

Description Length267 chars

Recommended: 120-160 chars

Issues (0)

3 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

83 rules

Sitemap reference found

Sponsored

Security Score

0%Critical

Critical / Transactional

HTTPS

No WAF

284d

Certificate Details

Type

Organization Validated (OV)

Certificate Authority

GlobalSign nv-sa

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

27.10.2025

Valid Until

28.11.2026

OCSP Stapling

Enabled

Subject Alternative Names (5)

www.gumtree.comgumtree.co.uk*.gumtree.com*.gumtree.co.ukgumtree.com

SHA-256 Fingerprint

FE:ED:A9:0B:65:08:A1:DA:13:B4:3F:1F:DD:2C:65:A2:0D:F5:3F:9C...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

alt-svc

h3=":443"; ma=2592000,h3-29=":443"; ma=2592000

cache-control

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

content-encoding

📦 Gzip(gzip)

content-language

en-GB

content-type

text/html;charset=utf-8

date

Mon, 16 Feb 2026 23:30:48 GMT

Good Warning Issue

Email Infrastructure

Microsoft 365

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

gumtree-com.mail.protection.outlook.com

Domain Information

gumtree.com

Domain Age

28y 8m

Created

19.06.1997

Expires

18.06.2026

Last Updated

17.05.2024

Registrar

MarkMonitor Inc.

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

Readex Pro + sans-serif

63/100

Readability

/30

32/40

15px · LH 1.47

Hierarchy

/20

8/25

1.33x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Readex Pro

Sans20px

Body Font

sans-serif

Sans15px

Contrast Ratio

Reading Comfort

~48 CPL

Optimal (45–75)

20px

15px

26px

15px

Major Third

Scale

⚠️ Small text: 15px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.47 ratio ensures comfortable reading.

⚠️ Weak hierarchy: Headlines should be at least 2x body size for clear visual structure.

✅ 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.

GGoogle Fonts

Business & Marketing Stack

6 Tools Detected

Enterprise

Behavior Analytics

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Quantcast ChoiceMid-Market

Cookie consent and privacy compliance tools

Social Media

Facebook SDKFree

Social widgets and sharing tools

Sponsored

Scripts & Styles

24 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(3)local(3)scripts.clarity.ms(2)cdn.confiant-integrations.net(2)securepubads.g.doubleclick.net(2)

Website Identity

gumtree.com

28 years old

MarkMonitor Inc.📧 Microsoft 365

Social Profiles

Facebook X (Twitter)Instagram YouTube TikTok

Sponsored

Last analyzed: 16 Feb 2026 at 23:31

Historical Analysis & Change Tracking