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

zyxel.com

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

Export

zyxel.com

Sponsored

Hosting Provider

Amazon Web Services (AWS)

aws.amazon.com

IP Address

54.166.122.157

Server Location

🇺🇸 Ashburn, United States

ASN

AS14618

Organization

AWS EC2 (us-east-1)

Server

CloudFront

CDN

CloudFront

Nameservers

pdns02.domaincontrol.com.pdns01.domaincontrol.com.

Performance

Page Speed

3.8 MB

250 requests

Image Optimization

Lazy Load

0–49

50–89

90–100

Architecture Stack

Monolithic

⚙️ SSR

Drupal

Technology Stack

16 Technologies Detected

Analytics

Libraries

CSS Frameworks

UI Components

Icon Libraries

Fonts

Tag Managers

Marketing

Advertising

CDN

SEO Analysis

C67/100

zyxel.comzyxel.com

Zyxel

Zyxel is a networking industry leader, deeply rooted in various network technology areas. We prioritize customer-centric product design, and focus on a super...

Description truncated.

Title Length5 chars

Recommended: 50-60 chars

Description Length265 chars

Recommended: 120-160 chars

Issues (1)

• Many images missing alt text (17/33)

4 issues found

Upgrade to view details

Crawlability

Sitemap

Type: index

robots.txt

47 rules

Sitemap reference found

Sponsored

Security Score

89%Very Good

Interactive

HTTPS

No WAF

338d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Sectigo Limited

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.3

HTTP Protocol

HTTP/2

Valid From

22.12.2025

Valid Until

22.01.2027

OCSP Stapling

Enabled

Subject Alternative Names (2)

*.zyxel.comzyxel.com

SHA-256 Fingerprint

9D:34:08:80:D1:84:65:AC:31:41:37:1E:B9:D4:6E:0C:02:04:D2:99...

Top Recommendations

Security recommendation preview

Upgrade to view recommendations

Upgrade to view header details

HTTP Headers

Developer Console

age

1703

cache-control

🟡 1 Hours(max-age=3600, public)

cloudfront-viewer-country

content-encoding

📦 Gzip(gzip)

content-language

content-security-policy

frame-ancestors 'self' https://www.facebook.com; frame-src '...

Good Warning Issue

Email Infrastructure

Barracuda

Score

SPF

DKIM

DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (2)

d88700a.ess.barracudanetworks.com

d88700b.ess.barracudanetworks.com

Domain Information

zyxel.com

Domain Age

32y 6m

Created

13.08.1993

Expires

12.08.2029

Last Updated

16.05.2024

Registrar

GoDaddy.com, LLC

DNSSEC

Not Enabled

Privacy & Compliance

Cookiebot

Cookie Consent Banner

Cookiebot

GDPR Indicators

Cookie consent banner detected

CMP: Cookiebot

Data Protection Officer mentioned

Typography & Readability

Galano Grotesque Medium + Noto Sans

38/100

Readability

/30

32/40

15px · LH 1.43

Hierarchy

/20

18/25

3.47x ratio

WCAG

/25

5/15

Contrast: undefined

Performance

/25

10/20

3 fonts

Heading Font

Galano Grotesque Medium

Sans52px

Body Font

Noto Sans

Sans15px

Contrast Ratio

Reading Comfort

~138 CPL

Needs attention

52px

24px

18px

15px

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

✅ Optimal line spacing: 1.43 ratio ensures comfortable reading.

✅ Strong hierarchy: Headlines are 3.5x larger than body text.

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

⚠️ Risky: Text appears on background images without overlay protection.

❌ Very long lines: ~138 chars/line causes eye strain. Use max-width: 65ch.

GGoogle Fonts Buy on MyFontsVariable Fonts

Business & Marketing Stack

9 Tools Detected

Enterprise

CRM Systems

HubSpotMid-Market

Customer Relationship Management platforms

Behavior Analytics

HotjarMid-Market

Microsoft ClarityFree

Google Tag ManagerFree

Google AnalyticsFree

User behavior and product analytics

Advertising

Facebook PixelMid-Market

LinkedIn AdsEnterprise

AdRollMid-Market

Ad platforms and retargeting pixels

Privacy & Cookies

CookiebotMid-Market

Cookie consent and privacy compliance tools

Sponsored

Scripts & Styles

30 Resources

Scripts

Styles

Async

Defer

Top Script Sources

googletagmanager.com(6)snap.licdn.com(3)connect.facebook.net(2)js-eu1.hs-banner.com(1)js-eu1.hscollectedforms.net(1)

Website Identity

zyxel.com

32 years old

GoDaddy.com, LLC📧 Barracuda

Social Profiles

Facebook X (Twitter)Instagram LinkedIn

Sponsored

Last analyzed: 18 Feb 2026 at 07:55

Historical Analysis & Change Tracking