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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prezly.com

https://prezly.com· First analyzed 18 Feb 2026· Updated 18 Feb 2026

Export

prezly.com

Sponsored

Hosting Provider

Cloudflare

cloudflare.com

IP Address

172.66.150.192

Server Location

🇨🇦 Toronto, Canada

ASN

AS13335

Organization

Cloudflare, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

sandy.ns.cloudflare.com.marty.ns.cloudflare.com.

Performance

Page Speed

726 KB

70 requests

Image Optimization

Lazy LoadResponsiveUploadcare

0–49

50–89

90–100

Architecture Stack

Hybrid

🔀 Hybrid

Frontend

Framework

Next.js

CMS

HubSpot CMS

Infrastructure

Hosting

Cloudflare

CDN

Cloudflare

Progressive Web App

Web ManifestApple Touch Icon

Technology Stack

13 Technologies Detected

Analytics

Email Marketing

Meta Frameworks

CSS Frameworks

Icon Libraries

Marketing

CDN

Customer Support

SEO Analysis

A+94/100

prezly.comprezly.com

PR Software For Modern Public Relations Management | Prezly

Use Prezly to publish stunning multimedia stories and distribute them to your top contacts. No code required.

Title Length59 chars

Recommended: 50-60 chars

Description Length109 chars

Recommended: 120-160 chars

Issues (0)

1 issues found

Upgrade to view details

Crawlability

Sitemap

Type: standard

robots.txt

8 rules

Sitemap reference found

Sponsored

A+

Security Score

98%Excellent

Static / Informational

HTTPS

WAF

80d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

ECDSA (secp256r1) (256 bit)

Signature

ECDSA with SHA-384

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2+H3

Valid From

08.02.2026

Valid Until

09.05.2026

Subject Alternative Names (2)

*.prezly.comprezly.com

SHA-256 Fingerprint

1B:A0:3F:AA:48:90:BA:3B:EA:BA:CE:18:49:BF:A4:DA:D8:86:46:79...

Upgrade to view header details

HTTP Headers

Developer Console

accept-ch

Sec-CH-Prefers-Color-Scheme

alt-svc

h3=":443"; ma=86400

cache-control

⚪ Custom(s-maxage=31536000)

cf-cache-status

DYNAMIC

cf-ray🇩🇪 Frankfurt

9cfa685e29ae3650-FRA

content-encoding

⚡ Brotli(br)

Good Warning Issue

Email Infrastructure

Google Workspace

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (5)

aspmx2.googlemail.com

aspmx.l.google.com

alt2.aspmx.l.google.com

aspmx3.googlemail.com

+1 more

Domain Information

prezly.com

Domain Age

17y 2m

Created

01.12.2008

Expires

01.12.2026

Last Updated

18.11.2024

Registrar

NameCheap, Inc.

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

Inter

49/100

Readability

/30

40/40

22px · LH 1.40

Hierarchy

/20

8/25

0.64x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

Inter

Sans14px

Body Font

Inter

Sans22px

Contrast Ratio

Reading Comfort

~35 CPL

Needs attention

14px

60px

14px

20px

22px

Major Sixth

Scale

✅ Excellent readability: 22px body text is ideal for all devices.

✅ Optimal line spacing: 1.40 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.

Buy on MyFonts

Business & Marketing Stack

3 Tools Detected

Growing

Behavior Analytics

Google AnalyticsFree

PlausibleSMB

Google Tag ManagerFree

User behavior and product analytics

Sponsored

Scripts & Styles

20 Resources

Scripts

Styles

Async

Defer

Top Script Sources

local(6)cdn.jsdelivr.net(2)googletagmanager.com(1)static.cloudflareinsights.com(1)

Website Identity

X (Twitter)LinkedIn

Sponsored

Last analyzed: 18 Feb 2026 at 03:24

Historical Analysis & Change Tracking