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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c-and-a.com

https://c-and-a.com· First analyzed 16 Feb 2026· Updated 16 Feb 2026

Export

c-and-a.com

Sponsored

Hosting Provider

RSC Commercial Services GmbH & Co. OHG

IP Address

195.39.227.124

Server Location

🇩🇪 Frankfurt am Main, Germany

ASN

AS28961

Organization

RSC Commercial Services GmbH & Co. OHG

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns1.p201.dns.oraclecloud.net.ns4.p201.dns.oraclecloud.net.ns3.p201.dns.oraclecloud.net.ns2.p201.dns.oraclecloud.net.

Performance

Page Speed

1.2 MB

36 requests

Image Optimization

Lazy LoadResponsive

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Infrastructure

Hosting

RSC Commercial Services GmbH & Co. OHG

CDN

Cloudflare

Technology Stack

5 Technologies Detected

Analytics

CSS Frameworks

Icon Libraries

CDN

SEO Analysis

B70/100

c-and-a.comc-and-a.com

Fashion and clothing to feel good | C&A online shop

Discover fashion for the whole family at affordable prices ➽ Now at C&A ➽ Large selection ✓ Trendy styles ✓

Title Length51 chars

Recommended: 50-60 chars

Description Length107 chars

Recommended: 120-160 chars

Issues (0)

5 issues found

Upgrade to view details

Crawlability

Sitemap

robots.txt

75 rules

Sitemap reference found

Sponsored

Security Score

61%Fair

Interactive

HTTPS

WAF

40d

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

29.12.2025

Valid Until

29.03.2026

Subject Alternative Names (4)

*.c-and-a.com*.www.c-and-a.com*.www2.c-and-a.comc-and-a.com

SHA-256 Fingerprint

54:79:78:E4:9A:B4:48:71:2D:E8:C3:1D:06:76:56:C5:CE:1B:AB:D2...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

214

alt-svc

h3=":443"; ma=86400

cache-control

⚪ Custom(s-maxage=300)

cf-cache-status

HIT

cf-ray🇩🇪 Frankfurt

9cee7c1db82c383c-FRA

content-encoding

⚡ Brotli(br)

Good Warning Issue

Email Infrastructure

Custom Mail Server

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

mx2.hc49051.c3s2.iphmx.com

mx1.hc49051.c3s2.iphmx.com

Domain Information

c-and-a.com

Domain Age

30y 1m

Created

23.01.1996

Expires

24.01.2027

Last Updated

17.01.2026

Registrar

Abion AB

DNSSEC

Not Enabled

Privacy & Compliance

OneTrust

Cookie Consent Banner

OneTrust

GDPR Indicators

Cookie consent banner detected

CMP: OneTrust

Data Protection Officer mentioned

Typography & Readability

CA Sans Variable

73/100

Readability

/30

32/40

14px · LH 1.50

Hierarchy

/20

18/25

3.43x ratio

WCAG

/25

15/15

Contrast: undefined

Performance

/25

13/20

1 font

Heading Font

CA Sans Variable

Sans48px

Body Font

CA Sans Variable

Sans14px

Contrast Ratio

Reading Comfort

~39 CPL

Needs attention

48px

40px

28px

14px

⚠️ Small text: 14px may be hard to read on mobile. Consider 16px+.

✅ Optimal line spacing: 1.50 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.4x larger than body text.

✅ 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

2 Tools Detected

Advanced

Behavior Analytics

Google AnalyticsFree

User behavior and product analytics

Privacy & Cookies

OneTrustEnterprise

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

3 Resources

Scripts

Styles

Async

Defer

Top Script Sources

cdn.cookielaw.org(1)local(1)

Website Identity

Facebook Instagram LinkedIn YouTube TikTok

Sponsored

Last analyzed: 16 Feb 2026 at 16:40

Historical Analysis & Change Tracking