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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publuu.com

https://publuu.com· First analyzed 19 Feb 2026· Updated 19 Feb 2026

Export

publuu.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

18.165.122.91

Server Location

🇮🇪 Dublin, Ireland

ASN

AS16509

Organization

AWS CloudFront (GLOBAL)

Server

Nginx

CDN

CloudFront

Nameservers

ns-1699.awsdns-20.co.uk.ns-186.awsdns-23.com.ns-700.awsdns-23.net.ns-1368.awsdns-43.org.

Performance

Page Speed

37 requests

Image Optimization

Lazy LoadWebPAVIFResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

WordPress

cms

setupo-newCustom

Technology Stack

8 Technologies Detected

Analytics

Plugins

Other

CSS Frameworks

Customer Support

Web Servers

SEO Analysis

A+94/100

publuu.compubluu.com

Publuu | Digital Publication Maker

Turn your PDFs into stunning, interactive flipbook with Publuu! Easily create engaging content with realistic page-flipping. Start today now!

Title Length34 chars

Recommended: 50-60 chars

Description Length141 chars

Recommended: 120-160 chars

Sponsored

Security Score

21%Critical

Interactive

HTTPS

No WAF

168d

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

08.07.2025

Valid Until

06.08.2026

OCSP Stapling

Enabled

Subject Alternative Names (1)

publuu.com

SHA-256 Fingerprint

68:3C:57:4B:A2:74:12:D2:D3:F7:14:99:EF:B6:02:4B:A8:D9:9C:17...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

19398

content-encoding

⚡ Brotli(br)

content-type

text/html

date

Thu, 19 Feb 2026 11:44:09 GMT

etag

W/"6996eed6-21912"

last-modified

Thu, 19 Feb 2026 11:07:02 GMT

Good Warning Issue

Email Infrastructure

Amazon SES

Score

SPF

DKIM

DMARC

DMARC Policy

None (Monitor Only)

MX Records (1)

inbound-smtp.us-east-1.amazonaws.com

Domain Information

publuu.com

Domain Age

6y 11m

Created

28.02.2019

Expires

28.02.2027

Last Updated

21.10.2025

Registrar

Amazon Registrar, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookie Consent Banner

GDPR Indicators

Typography & Readability

Urbanist + sans-serif

73/100

Readability

/30

40/40

16px · LH 1.70

Hierarchy

/20

25/25

2.62x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

20/20

System fonts

Heading Font

Urbanist

Sans42px

Body Font

sans-serif

Sans16px

Contrast Ratio

Reading Comfort

~36 CPL

Needs attention

42px

60px

20px

16px

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

✅ Optimal line spacing: 1.70 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 2.6x larger than body text.

✅ Excellent performance: System fonts eliminate font loading delays (better LCP).

✅ 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.

Buy on MyFonts

Business & Marketing Stack

2 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

11 Resources

Scripts

Styles

Async

Defer

Top Script Sources

d3vpszern3jgjo.cloudfront.net(7)googletagmanager.com(1)

Website Identity

Facebook LinkedIn

Sponsored

Last analyzed: 19 Feb 2026 at 17:07

Historical Analysis & Change Tracking